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Finding the Fourth Proportional to 132.76, 198.89 and 89.32

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Solution

The fourth proportional to 132.76, 198.89 and 89.32 is: 133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.76 : 198.89 = 89.32 : x
  2. Step 2: Convert to fraction form
    132.76/198.89 = 89.32/x
  3. Step 3: Cross multiply
    132.76x = 198.89 × 89.32
  4. Step 4: Simplify right side
    132.76x = 17,764.85
  5. Step 5: Solve for x
    x = 17,764.85/132.76
  6. Step 6: Final answer
    x = 133.81

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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.