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Finding the Fourth Proportional to 253,481.30, 349,805.15 and 138,770.61

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Solution

The fourth proportional to 253,481.30, 349,805.15 and 138,770.61 is: 191,503.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,481.30 : 349,805.15 = 138,770.61 : x
  2. Step 2: Convert to fraction form
    253,481.30/349,805.15 = 138,770.61/x
  3. Step 3: Cross multiply
    253,481.30x = 349,805.15 × 138,770.61
  4. Step 4: Simplify right side
    253,481.30x = 48,542,673,545.24
  5. Step 5: Solve for x
    x = 48,542,673,545.24/253,481.30
  6. Step 6: Final answer
    x = 191,503.96

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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.