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Finding the Fourth Proportional to 140.02, 209.61 and 109.13

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Solution

The fourth proportional to 140.02, 209.61 and 109.13 is: 163.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.02 : 209.61 = 109.13 : x
  2. Step 2: Convert to fraction form
    140.02/209.61 = 109.13/x
  3. Step 3: Cross multiply
    140.02x = 209.61 × 109.13
  4. Step 4: Simplify right side
    140.02x = 22,874.74
  5. Step 5: Solve for x
    x = 22,874.74/140.02
  6. Step 6: Final answer
    x = 163.37

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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.