The value of $k$ that must be added to $7, 16, 43,$ and $79$ so that they are in proportion is

$A$ man divides his property such that the ratio of his son's share to his wife's share and the ratio of his wife's share to his daughter's share are both $3:1$. If the daughter gets $Rs. 10000$ less than the son,then the value (in $rupees$) of the whole property is:

The ratio of the earnings of $A$ and $B$ is $4:7$. If the earnings of $A$ increase by $50\%$ and those of $B$ decrease by $25\%$,the new ratio of their earnings becomes $8:7$. What are $A$'s earnings (in $Rs.$)?

The prices of a refrigerator and a television set are in the ratio $5:3$. If the refrigerator costs $Rs. 5500$ more than the television set,then the price of the refrigerator is (in $Rs.$):

The fourth proportional to $5, 8, 15$ is

An amount of $Rs. 2430$ is divided among $A$,$B$,and $C$ such that if their shares are reduced by $Rs. 5$,$Rs. 10$,and $Rs. 15$ respectively,the remainders are in the ratio of $3:4:5$. Then,$B$'s share was (in $Rs.$):