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Finding the Fourth Proportional to 140.10, 209.94 and 119.88

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Solution

The fourth proportional to 140.10, 209.94 and 119.88 is: 179.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.10 : 209.94 = 119.88 : x
  2. Step 2: Convert to fraction form
    140.10/209.94 = 119.88/x
  3. Step 3: Cross multiply
    140.10x = 209.94 × 119.88
  4. Step 4: Simplify right side
    140.10x = 25,167.61
  5. Step 5: Solve for x
    x = 25,167.61/140.10
  6. Step 6: Final answer
    x = 179.64

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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.