tabaraka Allahu or taAAala Allahu

 examine these  verses... 7:54
نَّ رَبَّكُمُ اللَّهُ الَّذِي خَلَقَ السَّمَاوَاتِ وَالْأَرْضَ فِي سِتَّةِ أَيَّامٍ ثُمَّ اسْتَوَى عَلَى الْعَرْشِ يُغْشِي اللَّيْلَ النَّهَارَ يَطْلُبُهُ حَثِيثًا وَالشَّمْسَ وَالْقَمَرَ وَالنُّجُومَ مُسَخَّرَاتٍ بِأَمْرِهِ أَلَا لَهُ الْخَلْقُ وَالْأَمْرُ تَبَارَكَ اللَّهُ رَبُّ الْعَالَمِينَ


Inna rabbakumu Allahu allathee khalaqa alssamawati waalarda fee sittati ayyamin thumma istawa AAala alAAarshi yughshee allayla alnnahara yatlubuhu hatheethan waalshshamsa waalqamara waalnnujooma musakhkharatin biamrihi ala lahu alkhalqu waalamru tabaraka Allahu rabbu alAAalameena

 the phrase Tabaraka Allahu - is translates as *Most Exalted is God* using Rk translation


Your Lord is the one GOD, who created the heavens and the earth in six days, then assumed all authority. The night overtakes the day, as it pursues it persistently, and the sun, the moon, and the stars are committed to serve by His command. Absolutely, He controls all creation and all commands. Most Exalted is GOD, Lord of the universe.

 in another verse 23:116

فَتَعَالَى اللَّهُ الْمَلِكُ الْحَقُّ لَا إِلَهَ إِلَّا هُوَ رَبُّ الْعَرْشِ الْكَرِيمِ

FataAAala Allahu almaliku alhaqqu la ilaha illa huwa rabbu alAAarshi alkareemi

The phrase Fa TaAAala Allahu is translated as "Most Exalted is God" using Rk translation

and in 27:63

مَّنْ يَهْدِيكُمْ فِي ظُلُمَاتِ الْبَرِّ وَالْبَحْرِ وَمَنْ يُرْسِلُ الرِّيَاحَ بُشْرًا بَيْنَ يَدَيْ رَحْمَتِهِ أَإِلَهٌ مَعَ اللَّهِ تَعَالَى اللَّهُ عَمَّا يُشْرِكُونَ

Amman yahdeekum fee thulumati albarri waalbahri waman yursilu alrriyaha bushran bayna yaday rahmatihi ailahun maAAa Allahi taAAala Allahu AAamma yushrikoona

Who is the One who guides you in the darkness of land and sea? Who is the One who sends the winds with good news, signaling His mercy? Is it another god with GOD? Most exalted is GOD, above having any partner.

The phrase TaAAala Allahu is used as "Most Exalted is God"

 in verse 40:64
لَّهُ الَّذِي جَعَلَ لَكُمُ الْأَرْضَ قَرَارًا وَالسَّمَاءَ بِنَاءً وَصَوَّرَكُمْ فَأَحْسَنَ صُوَرَكُمْ وَرَزَقَكُمْ مِنَ الطَّيِّبَاتِ ذَلِكُمُ اللَّهُ رَبُّكُمْ فَتَبَارَكَ اللَّهُ رَبُّ الْعَالَمِينَ

Allahu allathee jaAAala lakumu alarda qararan waalssamaa binaan wasawwarakum faahsana suwarakum warazaqakum mina alttayyibati thalikumu Allahu rabbukum fatabaraka Allahu rabbu alAAalameena

GOD is the One who rendered the earth habitable for you, and the sky a formidable structure, and He designed you, and designed you well. He is the One who provides you with good provisions. Such is GOD your Lord; Most Exalted is GOD, Lord of the universe.

the phrase tabaraka allahu is translated as "Most Exalted is God"

 in 43:85  is used "Watabaraka" for Most Exalted
Most Exalted is the One who possesses all sovereignty of the heavens and the earth, and everything between them. With Him is the knowledge about the Hour (end of the world), and to Him you will be returned.

 in 55:78 - " tabaraka" is used for Most exalted
Most exalted is the name of your Lord, Possessor of Majesty and Honor.

in 67:1 - "tabaraka" is used for Most Exalted
Most exalted is the One in whose hands is all kingship, and He is Omnipotent.

so which is it? 

 i am inclined to go "Tabaraka Allahu" is "Most Blessed is God" based on my notion that baraka is blessing and tabaraka will be a derivate of baraka.

 see the conjoining of arabic letters ba - ra - kaf in http://corpus.quran.com/qurandictionary.jsp?q=brk

it reminds me og older scriptures when it reads Blessed be the name of the Lord e,g Psalm 113:2

 it is this interchanging of words that i dont understand,