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Finding the Fourth Proportional to 95.17, 142.55 and 87.68

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Solution

The fourth proportional to 95.17, 142.55 and 87.68 is: 131.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.17 : 142.55 = 87.68 : x
  2. Step 2: Convert to fraction form
    95.17/142.55 = 87.68/x
  3. Step 3: Cross multiply
    95.17x = 142.55 × 87.68
  4. Step 4: Simplify right side
    95.17x = 12,498.78
  5. Step 5: Solve for x
    x = 12,498.78/95.17
  6. Step 6: Final answer
    x = 131.33

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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.