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Finding the Fourth Proportional to 144.80, 217.26 and 115.88

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Solution

The fourth proportional to 144.80, 217.26 and 115.88 is: 173.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.80 : 217.26 = 115.88 : x
  2. Step 2: Convert to fraction form
    144.80/217.26 = 115.88/x
  3. Step 3: Cross multiply
    144.80x = 217.26 × 115.88
  4. Step 4: Simplify right side
    144.80x = 25,176.09
  5. Step 5: Solve for x
    x = 25,176.09/144.80
  6. Step 6: Final answer
    x = 173.87

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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.