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Finding the Fourth Proportional to 132.75, 198.99 and 113.61

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Solution

The fourth proportional to 132.75, 198.99 and 113.61 is: 170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.75 : 198.99 = 113.61 : x
  2. Step 2: Convert to fraction form
    132.75/198.99 = 113.61/x
  3. Step 3: Cross multiply
    132.75x = 198.99 × 113.61
  4. Step 4: Simplify right side
    132.75x = 22,607.25
  5. Step 5: Solve for x
    x = 22,607.25/132.75
  6. Step 6: Final answer
    x = 170.30

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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.