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Finding the Fourth Proportional to 167.76, 231.48 and 129.24

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Solution

The fourth proportional to 167.76, 231.48 and 129.24 is: 178.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.76 : 231.48 = 129.24 : x
  2. Step 2: Convert to fraction form
    167.76/231.48 = 129.24/x
  3. Step 3: Cross multiply
    167.76x = 231.48 × 129.24
  4. Step 4: Simplify right side
    167.76x = 29,916.48
  5. Step 5: Solve for x
    x = 29,916.48/167.76
  6. Step 6: Final answer
    x = 178.33

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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.