Question 457297
Let angle P = x degree, then angle Q=4x degree, and angle R=8x degree.
Since the sum of these three interior angles is 273 degree we write the equation:

{{{x+4x+8x=273}}}solving this equation we get x=21 degree

We know that the sum of interior angles of a quadrilateral is 360 degree, then 
the angle S=360-273=87 degree.

Answer:The measure of angle S=87 degree , and the angle R=8*21=168 degree.