The given sequence
.
Where 
The nth term of a geometric sequence formula
.
Where
is first term and r is common ratio.
(Substitute
)
(Subtract power:
)
Apply division property of equality: a = b then
.
(Divide each side by 3)
(Cancel common terms)
(Divide:
)
(Rewrite:
)
(Apply fifth root of each side and eliminate powers)
When
.




The geometric means are 6, 12, 24, 48.
The geometric means are 6, 12, 24, 48.