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Finding the Fourth Proportional to 83.80, 124.97 and 68.44

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Solution

The fourth proportional to 83.80, 124.97 and 68.44 is: 102.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.80 : 124.97 = 68.44 : x
  2. Step 2: Convert to fraction form
    83.80/124.97 = 68.44/x
  3. Step 3: Cross multiply
    83.80x = 124.97 × 68.44
  4. Step 4: Simplify right side
    83.80x = 8,552.95
  5. Step 5: Solve for x
    x = 8,552.95/83.80
  6. Step 6: Final answer
    x = 102.06

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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.