Home / 87,639.90-131,459.85-84,140.70

Finding the Fourth Proportional to 87,639.90, 131,459.85 and 84,140.70

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Solution

The fourth proportional to 87,639.90, 131,459.85 and 84,140.70 is: 126,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.90 : 131,459.85 = 84,140.70 : x
  2. Step 2: Convert to fraction form
    87,639.90/131,459.85 = 84,140.70/x
  3. Step 3: Cross multiply
    87,639.90x = 131,459.85 × 84,140.70
  4. Step 4: Simplify right side
    87,639.90x = 11,061,123,800.90
  5. Step 5: Solve for x
    x = 11,061,123,800.90/87,639.90
  6. Step 6: Final answer
    x = 126,211.05

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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.