Find the geometric mean of 4 and 120

The geometric mean of n numbers is the nth root of the product of those numbers

so the geometric mean of the 2 numbers, 4 and 120, is the 2nd root or square root of the product of 4 and 120

basically

the gemetric mean is the square root of 4*120=480

geometric mean=√480=4√30

the geometric mean of 4 and 120 is 4√30

21.9089 is the geometric mean ...