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Finding the Fourth Proportional to 104,456.85, 144,104.20 and 61,990.78

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Solution

The fourth proportional to 104,456.85, 144,104.20 and 61,990.78 is: 85,519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,456.85 : 144,104.20 = 61,990.78 : x
  2. Step 2: Convert to fraction form
    104,456.85/144,104.20 = 61,990.78/x
  3. Step 3: Cross multiply
    104,456.85x = 144,104.20 × 61,990.78
  4. Step 4: Simplify right side
    104,456.85x = 8,933,131,759.28
  5. Step 5: Solve for x
    x = 8,933,131,759.28/104,456.85
  6. Step 6: Final answer
    x = 85,519.83

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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.