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Finding the Fourth Proportional to 107.92, 149.04 and 75.11

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Solution

The fourth proportional to 107.92, 149.04 and 75.11 is: 103.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.92 : 149.04 = 75.11 : x
  2. Step 2: Convert to fraction form
    107.92/149.04 = 75.11/x
  3. Step 3: Cross multiply
    107.92x = 149.04 × 75.11
  4. Step 4: Simplify right side
    107.92x = 11,194.39
  5. Step 5: Solve for x
    x = 11,194.39/107.92
  6. Step 6: Final answer
    x = 103.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.