Solve for x, y, and z Similar Right Triangles and Geometric Mean

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Can someone pls ! pls answer all. no explanation needed..

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income