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Finding the Fourth Proportional to 132.92, 198.31 and 115.77

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Solution

The fourth proportional to 132.92, 198.31 and 115.77 is: 172.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.92 : 198.31 = 115.77 : x
  2. Step 2: Convert to fraction form
    132.92/198.31 = 115.77/x
  3. Step 3: Cross multiply
    132.92x = 198.31 × 115.77
  4. Step 4: Simplify right side
    132.92x = 22,958.06
  5. Step 5: Solve for x
    x = 22,958.06/132.92
  6. Step 6: Final answer
    x = 172.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.