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Finding the Fourth Proportional to 87.43, 131.15 and 46.29

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Solution

The fourth proportional to 87.43, 131.15 and 46.29 is: 69.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.43 : 131.15 = 46.29 : x
  2. Step 2: Convert to fraction form
    87.43/131.15 = 46.29/x
  3. Step 3: Cross multiply
    87.43x = 131.15 × 46.29
  4. Step 4: Simplify right side
    87.43x = 6,070.80
  5. Step 5: Solve for x
    x = 6,070.80/87.43
  6. Step 6: Final answer
    x = 69.44

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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.