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Finding the Fourth Proportional to 83.61, 125.51 and 49.46

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Solution

The fourth proportional to 83.61, 125.51 and 49.46 is: 74.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.61 : 125.51 = 49.46 : x
  2. Step 2: Convert to fraction form
    83.61/125.51 = 49.46/x
  3. Step 3: Cross multiply
    83.61x = 125.51 × 49.46
  4. Step 4: Simplify right side
    83.61x = 6,206.85
  5. Step 5: Solve for x
    x = 6,206.85/83.61
  6. Step 6: Final answer
    x = 74.24

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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.