Home / 87,613.40-131,420.10-86,691.80

Finding the Fourth Proportional to 87,613.40, 131,420.10 and 86,691.80

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Solution

The fourth proportional to 87,613.40, 131,420.10 and 86,691.80 is: 130,037.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,613.40 : 131,420.10 = 86,691.80 : x
  2. Step 2: Convert to fraction form
    87,613.40/131,420.10 = 86,691.80/x
  3. Step 3: Cross multiply
    87,613.40x = 131,420.10 × 86,691.80
  4. Step 4: Simplify right side
    87,613.40x = 11,393,045,025.18
  5. Step 5: Solve for x
    x = 11,393,045,025.18/87,613.40
  6. Step 6: Final answer
    x = 130,037.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.