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Finding the Fourth Proportional to 104.49, 144.11 and 79.85

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Solution

The fourth proportional to 104.49, 144.11 and 79.85 is: 110.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.49 : 144.11 = 79.85 : x
  2. Step 2: Convert to fraction form
    104.49/144.11 = 79.85/x
  3. Step 3: Cross multiply
    104.49x = 144.11 × 79.85
  4. Step 4: Simplify right side
    104.49x = 11,507.74
  5. Step 5: Solve for x
    x = 11,507.74/104.49
  6. Step 6: Final answer
    x = 110.13

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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.