Home / 87,128-135,156

Finding the Third Proportional to 87,128 and 135,156

Calculator

Solution

The third proportional to 87,128 and 135,156 is: 209,658.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128 : 135,156 = 135,156 : x
  2. Step 2: Convert to fraction form
    87,128/135,156 = 135,156/x
  3. Step 3: Cross multiply
    87,128x = 135,156 × 135,156
  4. Step 4: Simplify right side
    87,128x = 18,267,144,336
  5. Step 5: Solve for x
    x = 18,267,144,336/87,128
  6. Step 6: Final answer
    x = 209,658.71

Related Problems

Find third proportional to 43,564 and 67,578
Half scale
Find third proportional to 174,256 and 270,312
Double scale
Find third proportional to 87,130 and 135,159
Similar ratio
Find third proportional to 130,692 and 202,734
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.