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Finding the Fourth Proportional to 179.28, 247 and 123.92

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Solution

The fourth proportional to 179.28, 247 and 123.92 is: 170.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.28 : 247 = 123.92 : x
  2. Step 2: Convert to fraction form
    179.28/247 = 123.92/x
  3. Step 3: Cross multiply
    179.28x = 247 × 123.92
  4. Step 4: Simplify right side
    179.28x = 30,608.24
  5. Step 5: Solve for x
    x = 30,608.24/179.28
  6. Step 6: Final answer
    x = 170.73

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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.