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Finding the Fourth Proportional to 179.42, 269.21 and 76.73

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Solution

The fourth proportional to 179.42, 269.21 and 76.73 is: 115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.42 : 269.21 = 76.73 : x
  2. Step 2: Convert to fraction form
    179.42/269.21 = 76.73/x
  3. Step 3: Cross multiply
    179.42x = 269.21 × 76.73
  4. Step 4: Simplify right side
    179.42x = 20,655.33
  5. Step 5: Solve for x
    x = 20,655.33/179.42
  6. Step 6: Final answer
    x = 115.13

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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.