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Finding the Fourth Proportional to 166.64, 230.18 and 129.74

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Solution

The fourth proportional to 166.64, 230.18 and 129.74 is: 179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.64 : 230.18 = 129.74 : x
  2. Step 2: Convert to fraction form
    166.64/230.18 = 129.74/x
  3. Step 3: Cross multiply
    166.64x = 230.18 × 129.74
  4. Step 4: Simplify right side
    166.64x = 29,863.55
  5. Step 5: Solve for x
    x = 29,863.55/166.64
  6. Step 6: Final answer
    x = 179.21

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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.