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Finding the Fourth Proportional to 118.26, 163.08 and 107.73

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Solution

The fourth proportional to 118.26, 163.08 and 107.73 is: 148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.26 : 163.08 = 107.73 : x
  2. Step 2: Convert to fraction form
    118.26/163.08 = 107.73/x
  3. Step 3: Cross multiply
    118.26x = 163.08 × 107.73
  4. Step 4: Simplify right side
    118.26x = 17,568.61
  5. Step 5: Solve for x
    x = 17,568.61/118.26
  6. Step 6: Final answer
    x = 148.56

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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.