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Finding the Fourth Proportional to 178.68, 267.54 and 143.79

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Solution

The fourth proportional to 178.68, 267.54 and 143.79 is: 215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.68 : 267.54 = 143.79 : x
  2. Step 2: Convert to fraction form
    178.68/267.54 = 143.79/x
  3. Step 3: Cross multiply
    178.68x = 267.54 × 143.79
  4. Step 4: Simplify right side
    178.68x = 38,468.87
  5. Step 5: Solve for x
    x = 38,468.87/178.68
  6. Step 6: Final answer
    x = 215.30

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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.