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Finding the Fourth Proportional to 179.64, 269.56 and 76.92

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Solution

The fourth proportional to 179.64, 269.56 and 76.92 is: 115.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.64 : 269.56 = 76.92 : x
  2. Step 2: Convert to fraction form
    179.64/269.56 = 76.92/x
  3. Step 3: Cross multiply
    179.64x = 269.56 × 76.92
  4. Step 4: Simplify right side
    179.64x = 20,733.64
  5. Step 5: Solve for x
    x = 20,733.64/179.64
  6. Step 6: Final answer
    x = 115.42

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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.