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Finding the Fourth Proportional to 118.75, 163.48 and 103.97

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Solution

The fourth proportional to 118.75, 163.48 and 103.97 is: 143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.75 : 163.48 = 103.97 : x
  2. Step 2: Convert to fraction form
    118.75/163.48 = 103.97/x
  3. Step 3: Cross multiply
    118.75x = 163.48 × 103.97
  4. Step 4: Simplify right side
    118.75x = 16,997.02
  5. Step 5: Solve for x
    x = 16,997.02/118.75
  6. Step 6: Final answer
    x = 143.13

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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.