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Finding the Fourth Proportional to 83.57, 125.34 and 60.78

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Solution

The fourth proportional to 83.57, 125.34 and 60.78 is: 91.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.57 : 125.34 = 60.78 : x
  2. Step 2: Convert to fraction form
    83.57/125.34 = 60.78/x
  3. Step 3: Cross multiply
    83.57x = 125.34 × 60.78
  4. Step 4: Simplify right side
    83.57x = 7,618.17
  5. Step 5: Solve for x
    x = 7,618.17/83.57
  6. Step 6: Final answer
    x = 91.16

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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.