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Finding the Fourth Proportional to 132.20, 198.08 and 121.14

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Solution

The fourth proportional to 132.20, 198.08 and 121.14 is: 181.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.20 : 198.08 = 121.14 : x
  2. Step 2: Convert to fraction form
    132.20/198.08 = 121.14/x
  3. Step 3: Cross multiply
    132.20x = 198.08 × 121.14
  4. Step 4: Simplify right side
    132.20x = 23,995.41
  5. Step 5: Solve for x
    x = 23,995.41/132.20
  6. Step 6: Final answer
    x = 181.51

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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.