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Finding the Fourth Proportional to 140.61, 209.92 and 107.94

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Solution

The fourth proportional to 140.61, 209.92 and 107.94 is: 161.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.61 : 209.92 = 107.94 : x
  2. Step 2: Convert to fraction form
    140.61/209.92 = 107.94/x
  3. Step 3: Cross multiply
    140.61x = 209.92 × 107.94
  4. Step 4: Simplify right side
    140.61x = 22,657.18
  5. Step 5: Solve for x
    x = 22,657.18/140.61
  6. Step 6: Final answer
    x = 161.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.