In the table the first ratio is

And the next ratio is
.
Here both numerator and denominator are not multiplied by the same factor.
Let's check out first ratio and multiply both numerator and denominator by 5

So the error is at 9. There have to be 15 .
The third ratio is

Multiply the numerator and denominator of the first ratio by 25

So the error is at 27. There have to be 75 .