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Finding the Fourth Proportional to 83.67, 125.26 and 63.31

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Solution

The fourth proportional to 83.67, 125.26 and 63.31 is: 94.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.67 : 125.26 = 63.31 : x
  2. Step 2: Convert to fraction form
    83.67/125.26 = 63.31/x
  3. Step 3: Cross multiply
    83.67x = 125.26 × 63.31
  4. Step 4: Simplify right side
    83.67x = 7,930.21
  5. Step 5: Solve for x
    x = 7,930.21/83.67
  6. Step 6: Final answer
    x = 94.78

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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.