Home / 87.75-117

Finding the Third Proportional to 87.75 and 117

Calculator

Solution

The third proportional to 87.75 and 117 is: 156

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.75 : 117 = 117 : x
  2. Step 2: Convert to fraction form
    87.75/117 = 117/x
  3. Step 3: Cross multiply
    87.75x = 117 × 117
  4. Step 4: Simplify right side
    87.75x = 13,689
  5. Step 5: Solve for x
    x = 13,689/87.75
  6. Step 6: Final answer
    x = 156

Related Problems

Find third proportional to 43.88 and 58.50
Half scale
Find third proportional to 175.50 and 234
Double scale
Find third proportional to 90 and 120
Similar ratio
Find third proportional to 131.63 and 175.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.