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Finding the Fourth Proportional to 132.02, 197.92 and 71.20

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Solution

The fourth proportional to 132.02, 197.92 and 71.20 is: 106.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.02 : 197.92 = 71.20 : x
  2. Step 2: Convert to fraction form
    132.02/197.92 = 71.20/x
  3. Step 3: Cross multiply
    132.02x = 197.92 × 71.20
  4. Step 4: Simplify right side
    132.02x = 14,091.90
  5. Step 5: Solve for x
    x = 14,091.90/132.02
  6. Step 6: Final answer
    x = 106.74

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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.