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Finding the Fourth Proportional to 87.47, 119.97 and 84.48

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Solution

The fourth proportional to 87.47, 119.97 and 84.48 is: 115.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.47 : 119.97 = 84.48 : x
  2. Step 2: Convert to fraction form
    87.47/119.97 = 84.48/x
  3. Step 3: Cross multiply
    87.47x = 119.97 × 84.48
  4. Step 4: Simplify right side
    87.47x = 10,135.07
  5. Step 5: Solve for x
    x = 10,135.07/87.47
  6. Step 6: Final answer
    x = 115.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.