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Finding the Fourth Proportional to 87,482, 131,223 and 21,818

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Solution

The fourth proportional to 87,482, 131,223 and 21,818 is: 32,727

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,482 : 131,223 = 21,818 : x
  2. Step 2: Convert to fraction form
    87,482/131,223 = 21,818/x
  3. Step 3: Cross multiply
    87,482x = 131,223 × 21,818
  4. Step 4: Simplify right side
    87,482x = 2,863,023,414
  5. Step 5: Solve for x
    x = 2,863,023,414/87,482
  6. Step 6: Final answer
    x = 32,727

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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.