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Finding the Fourth Proportional to 95.34, 142.32 and 87.66

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Solution

The fourth proportional to 95.34, 142.32 and 87.66 is: 130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.34 : 142.32 = 87.66 : x
  2. Step 2: Convert to fraction form
    95.34/142.32 = 87.66/x
  3. Step 3: Cross multiply
    95.34x = 142.32 × 87.66
  4. Step 4: Simplify right side
    95.34x = 12,475.77
  5. Step 5: Solve for x
    x = 12,475.77/95.34
  6. Step 6: Final answer
    x = 130.86

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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.