Home / 87,126-128,137

Finding the Third Proportional to 87,126 and 128,137

Calculator

Solution

The third proportional to 87,126 and 128,137 is: 188,452.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,126 : 128,137 = 128,137 : x
  2. Step 2: Convert to fraction form
    87,126/128,137 = 128,137/x
  3. Step 3: Cross multiply
    87,126x = 128,137 × 128,137
  4. Step 4: Simplify right side
    87,126x = 16,419,090,769
  5. Step 5: Solve for x
    x = 16,419,090,769/87,126
  6. Step 6: Final answer
    x = 188,452.25

Related Problems

Find third proportional to 43,563 and 64,068.50
Half scale
Find third proportional to 174,252 and 256,274
Double scale
Find third proportional to 87,128 and 128,140
Similar ratio
Find third proportional to 130,689 and 192,205.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.