Insert 5 G. Ms between 3 and 192

6, 12, 24, 48 and 96.

Step-by-step explanation:

We look for a geometric sequence with first term = 3:

nth term = a1 r^ (n-1)

3 r^ (n-1) = 192

r^ (n-1) = 192 / 3 = 64

2 ^ 6 = 64 so r = 2.

Series is 3,6, 12, 24, 48, 96, 192.

So 5 geometric means would be 6, 12, 24, 48 and 96.