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Finding the Fourth Proportional to 83.97, 125.42 and 68.58

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Solution

The fourth proportional to 83.97, 125.42 and 68.58 is: 102.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.97 : 125.42 = 68.58 : x
  2. Step 2: Convert to fraction form
    83.97/125.42 = 68.58/x
  3. Step 3: Cross multiply
    83.97x = 125.42 × 68.58
  4. Step 4: Simplify right side
    83.97x = 8,600.96
  5. Step 5: Solve for x
    x = 8,600.96/83.97
  6. Step 6: Final answer
    x = 102.43

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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.