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Finding the Fourth Proportional to 83.66, 125.12 and 49.34

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Solution

The fourth proportional to 83.66, 125.12 and 49.34 is: 73.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.66 : 125.12 = 49.34 : x
  2. Step 2: Convert to fraction form
    83.66/125.12 = 49.34/x
  3. Step 3: Cross multiply
    83.66x = 125.12 × 49.34
  4. Step 4: Simplify right side
    83.66x = 6,173.42
  5. Step 5: Solve for x
    x = 6,173.42/83.66
  6. Step 6: Final answer
    x = 73.79

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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.