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Finding the Fourth Proportional to 166.16, 229.32 and 129.41

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Solution

The fourth proportional to 166.16, 229.32 and 129.41 is: 178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.16 : 229.32 = 129.41 : x
  2. Step 2: Convert to fraction form
    166.16/229.32 = 129.41/x
  3. Step 3: Cross multiply
    166.16x = 229.32 × 129.41
  4. Step 4: Simplify right side
    166.16x = 29,675.15
  5. Step 5: Solve for x
    x = 29,675.15/166.16
  6. Step 6: Final answer
    x = 178.60

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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.