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Finding the Fourth Proportional to 67,193.82, 100,879.29 and 39,139.74

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Solution

The fourth proportional to 67,193.82, 100,879.29 and 39,139.74 is: 58,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,193.82 : 100,879.29 = 39,139.74 : x
  2. Step 2: Convert to fraction form
    67,193.82/100,879.29 = 39,139.74/x
  3. Step 3: Cross multiply
    67,193.82x = 100,879.29 × 39,139.74
  4. Step 4: Simplify right side
    67,193.82x = 3,948,389,181.98
  5. Step 5: Solve for x
    x = 3,948,389,181.98/67,193.82
  6. Step 6: Final answer
    x = 58,761.20

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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.