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Finding the Fourth Proportional to 179.64, 269.42 and 76.96

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Solution

The fourth proportional to 179.64, 269.42 and 76.96 is: 115.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.64 : 269.42 = 76.96 : x
  2. Step 2: Convert to fraction form
    179.64/269.42 = 76.96/x
  3. Step 3: Cross multiply
    179.64x = 269.42 × 76.96
  4. Step 4: Simplify right side
    179.64x = 20,734.56
  5. Step 5: Solve for x
    x = 20,734.56/179.64
  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.