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Finding the Fourth Proportional to 179.72, 269.34 and 131.24

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Solution

The fourth proportional to 179.72, 269.34 and 131.24 is: 196.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.72 : 269.34 = 131.24 : x
  2. Step 2: Convert to fraction form
    179.72/269.34 = 131.24/x
  3. Step 3: Cross multiply
    179.72x = 269.34 × 131.24
  4. Step 4: Simplify right side
    179.72x = 35,348.18
  5. Step 5: Solve for x
    x = 35,348.18/179.72
  6. Step 6: Final answer
    x = 196.68

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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.