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Finding the Fourth Proportional to 87,761.92, 131,653.80 and 28,581.70

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Solution

The fourth proportional to 87,761.92, 131,653.80 and 28,581.70 is: 42,876.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,761.92 : 131,653.80 = 28,581.70 : x
  2. Step 2: Convert to fraction form
    87,761.92/131,653.80 = 28,581.70/x
  3. Step 3: Cross multiply
    87,761.92x = 131,653.80 × 28,581.70
  4. Step 4: Simplify right side
    87,761.92x = 3,762,889,415.46
  5. Step 5: Solve for x
    x = 3,762,889,415.46/87,761.92
  6. Step 6: Final answer
    x = 42,876.11

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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.