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Finding the Fourth Proportional to 87.87, 121.25 and 48.52

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Solution

The fourth proportional to 87.87, 121.25 and 48.52 is: 66.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.87 : 121.25 = 48.52 : x
  2. Step 2: Convert to fraction form
    87.87/121.25 = 48.52/x
  3. Step 3: Cross multiply
    87.87x = 121.25 × 48.52
  4. Step 4: Simplify right side
    87.87x = 5,883.05
  5. Step 5: Solve for x
    x = 5,883.05/87.87
  6. Step 6: Final answer
    x = 66.96

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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.