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Finding the Fourth Proportional to 166.57, 249.78 and 98.11

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Solution

The fourth proportional to 166.57, 249.78 and 98.11 is: 147.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.57 : 249.78 = 98.11 : x
  2. Step 2: Convert to fraction form
    166.57/249.78 = 98.11/x
  3. Step 3: Cross multiply
    166.57x = 249.78 × 98.11
  4. Step 4: Simplify right side
    166.57x = 24,505.92
  5. Step 5: Solve for x
    x = 24,505.92/166.57
  6. Step 6: Final answer
    x = 147.12

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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.