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The common ratio is 1:2

The common ratio of the geometric sequence is 2. then the fifth term of the geometric sequence is 6.25.

What is a sequence?

A sequence is a list of elements that have been ordered in a sequential manner, such that members come either before or after.

The given sequence is 100, 50, 25, 12.5, ...

The ratio of the terms will be

[tex]\dfrac{100}{50} = 2\\\\\\\dfrac{50}{25} = 2\\\\\\\dfrac{25}{12.5} = 2[/tex]

Then the fifth term will be

[tex]x = \dfrac{12.5}{2} = 6.25[/tex]

More about the sequence link is given below.

https://brainly.com/question/21961097