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Finding the Fourth Proportional to 95.20, 141.86 and 87.23

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Solution

The fourth proportional to 95.20, 141.86 and 87.23 is: 129.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.20 : 141.86 = 87.23 : x
  2. Step 2: Convert to fraction form
    95.20/141.86 = 87.23/x
  3. Step 3: Cross multiply
    95.20x = 141.86 × 87.23
  4. Step 4: Simplify right side
    95.20x = 12,375.02
  5. Step 5: Solve for x
    x = 12,375.02/95.20
  6. Step 6: Final answer
    x = 129.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.