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Finding the Fourth Proportional to 166.20, 229.10 and 124.74

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Solution

The fourth proportional to 166.20, 229.10 and 124.74 is: 171.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.20 : 229.10 = 124.74 : x
  2. Step 2: Convert to fraction form
    166.20/229.10 = 124.74/x
  3. Step 3: Cross multiply
    166.20x = 229.10 × 124.74
  4. Step 4: Simplify right side
    166.20x = 28,577.31
  5. Step 5: Solve for x
    x = 28,577.31/166.20
  6. Step 6: Final answer
    x = 171.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.