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Finding the Fourth Proportional to 95.12, 131.24 and 80.42

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Solution

The fourth proportional to 95.12, 131.24 and 80.42 is: 110.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.12 : 131.24 = 80.42 : x
  2. Step 2: Convert to fraction form
    95.12/131.24 = 80.42/x
  3. Step 3: Cross multiply
    95.12x = 131.24 × 80.42
  4. Step 4: Simplify right side
    95.12x = 10,553.92
  5. Step 5: Solve for x
    x = 10,553.92/95.12
  6. Step 6: Final answer
    x = 110.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.