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Finding the Fourth Proportional to 87,654, 131,481 and 29,286

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Solution

The fourth proportional to 87,654, 131,481 and 29,286 is: 43,929

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,654 : 131,481 = 29,286 : x
  2. Step 2: Convert to fraction form
    87,654/131,481 = 29,286/x
  3. Step 3: Cross multiply
    87,654x = 131,481 × 29,286
  4. Step 4: Simplify right side
    87,654x = 3,850,552,566
  5. Step 5: Solve for x
    x = 3,850,552,566/87,654
  6. Step 6: Final answer
    x = 43,929

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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.