SOLUTION: Please help me solve this question. Insert 4 geometric mean between 1/8 and 128

  which is    where k is the common ratio



You are asked to insert  thru  while being given

  



  -->  

which implies  













and as a check





Hope this helps! 



EDIT: Note to student: I assumed you wanted four elements of a geometric progression, inserting "4 geometric means" does not make sense to me.