Find Average Value of Mean

Find the geometric average mean value of the given numbers. The geometric mean is a special type of average for a set of n numbers by using the product of their values (multiply them all together) and then take nth root.
For example : Geometric mean for two numbers, multiply them and take square root, geometric mean three numbers, multiply all together and take cube root. Hence the Geometric Mean Formula is as follows
Geometric Mean = {(X1)(X2)(X3)........(Xn)}1/n