The mean proportional of $0.25$ and $0.04$ is

$94$ is divided into two parts in such a way that the fifth part of the first and the eighth part of the second are in the ratio $3:4$. The first part is:

The ratio of the number of boys to girls in an institution is $6:5$. If there are $192$ boys in total,find the total number of students in the institution.

Find the value of $x$ in the following proportion: $27: 72 :: x: 8$

The ratio of the ages of a man and his wife is $4:3$. After $4$ years,this ratio will be $9:7$. If at the time of marriage,the ratio was $5:3$,then how many years ago were they married?

Two numbers are respectively $20 \%$ and $50 \%$ more than a third number. The ratio of the two numbers is