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Finding the Fourth Proportional to 83.38, 125.56 and 67.22

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Solution

The fourth proportional to 83.38, 125.56 and 67.22 is: 101.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.38 : 125.56 = 67.22 : x
  2. Step 2: Convert to fraction form
    83.38/125.56 = 67.22/x
  3. Step 3: Cross multiply
    83.38x = 125.56 × 67.22
  4. Step 4: Simplify right side
    83.38x = 8,440.14
  5. Step 5: Solve for x
    x = 8,440.14/83.38
  6. Step 6: Final answer
    x = 101.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.