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Finding the Fourth Proportional to 140.18, 210.08 and 107.96

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Solution

The fourth proportional to 140.18, 210.08 and 107.96 is: 161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.18 : 210.08 = 107.96 : x
  2. Step 2: Convert to fraction form
    140.18/210.08 = 107.96/x
  3. Step 3: Cross multiply
    140.18x = 210.08 × 107.96
  4. Step 4: Simplify right side
    140.18x = 22,679.46
  5. Step 5: Solve for x
    x = 22,679.46/140.18
  6. Step 6: Final answer
    x = 161.79

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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.