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Finding the Fourth Proportional to 132.10, 182.16 and 121.86

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Solution

The fourth proportional to 132.10, 182.16 and 121.86 is: 168.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.10 : 182.16 = 121.86 : x
  2. Step 2: Convert to fraction form
    132.10/182.16 = 121.86/x
  3. Step 3: Cross multiply
    132.10x = 182.16 × 121.86
  4. Step 4: Simplify right side
    132.10x = 22,198.02
  5. Step 5: Solve for x
    x = 22,198.02/132.10
  6. Step 6: Final answer
    x = 168.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.