Home / 87,709.20-131,565-28,545.12

Finding the Fourth Proportional to 87,709.20, 131,565 and 28,545.12

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Solution

The fourth proportional to 87,709.20, 131,565 and 28,545.12 is: 42,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,709.20 : 131,565 = 28,545.12 : x
  2. Step 2: Convert to fraction form
    87,709.20/131,565 = 28,545.12/x
  3. Step 3: Cross multiply
    87,709.20x = 131,565 × 28,545.12
  4. Step 4: Simplify right side
    87,709.20x = 3,755,538,712.80
  5. Step 5: Solve for x
    x = 3,755,538,712.80/87,709.20
  6. Step 6: Final answer
    x = 42,818.07

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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.