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Finding the Fourth Proportional to 140, 209.52 and 132.12

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Solution

The fourth proportional to 140, 209.52 and 132.12 is: 197.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140 : 209.52 = 132.12 : x
  2. Step 2: Convert to fraction form
    140/209.52 = 132.12/x
  3. Step 3: Cross multiply
    140x = 209.52 × 132.12
  4. Step 4: Simplify right side
    140x = 27,681.78
  5. Step 5: Solve for x
    x = 27,681.78/140
  6. Step 6: Final answer
    x = 197.73

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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.