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Finding the Fourth Proportional to 178.26, 267.45 and 142.39

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Solution

The fourth proportional to 178.26, 267.45 and 142.39 is: 213.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.26 : 267.45 = 142.39 : x
  2. Step 2: Convert to fraction form
    178.26/267.45 = 142.39/x
  3. Step 3: Cross multiply
    178.26x = 267.45 × 142.39
  4. Step 4: Simplify right side
    178.26x = 38,082.21
  5. Step 5: Solve for x
    x = 38,082.21/178.26
  6. Step 6: Final answer
    x = 213.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.