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Finding the Fourth Proportional to 83.92, 126.24 and 73.84

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Solution

The fourth proportional to 83.92, 126.24 and 73.84 is: 111.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.92 : 126.24 = 73.84 : x
  2. Step 2: Convert to fraction form
    83.92/126.24 = 73.84/x
  3. Step 3: Cross multiply
    83.92x = 126.24 × 73.84
  4. Step 4: Simplify right side
    83.92x = 9,321.56
  5. Step 5: Solve for x
    x = 9,321.56/83.92
  6. Step 6: Final answer
    x = 111.08

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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.