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Finding the Fourth Proportional to 162.66, 223.71 and 129.85

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Solution

The fourth proportional to 162.66, 223.71 and 129.85 is: 178.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.66 : 223.71 = 129.85 : x
  2. Step 2: Convert to fraction form
    162.66/223.71 = 129.85/x
  3. Step 3: Cross multiply
    162.66x = 223.71 × 129.85
  4. Step 4: Simplify right side
    162.66x = 29,049.69
  5. Step 5: Solve for x
    x = 29,049.69/162.66
  6. Step 6: Final answer
    x = 178.59

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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.