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Finding the Fourth Proportional to 166.59, 229.91 and 129.67

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Solution

The fourth proportional to 166.59, 229.91 and 129.67 is: 178.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.59 : 229.91 = 129.67 : x
  2. Step 2: Convert to fraction form
    166.59/229.91 = 129.67/x
  3. Step 3: Cross multiply
    166.59x = 229.91 × 129.67
  4. Step 4: Simplify right side
    166.59x = 29,811.21
  5. Step 5: Solve for x
    x = 29,811.21/166.59
  6. Step 6: Final answer
    x = 178.95

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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.