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Finding the Fourth Proportional to 63.75, 95.17 and 55.15

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Solution

The fourth proportional to 63.75, 95.17 and 55.15 is: 82.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.75 : 95.17 = 55.15 : x
  2. Step 2: Convert to fraction form
    63.75/95.17 = 55.15/x
  3. Step 3: Cross multiply
    63.75x = 95.17 × 55.15
  4. Step 4: Simplify right side
    63.75x = 5,248.63
  5. Step 5: Solve for x
    x = 5,248.63/63.75
  6. Step 6: Final answer
    x = 82.33

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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.