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Finding the Fourth Proportional to 139,367.88, 192,327.84 and 75,705.66

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Solution

The fourth proportional to 139,367.88, 192,327.84 and 75,705.66 is: 104,473.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,367.88 : 192,327.84 = 75,705.66 : x
  2. Step 2: Convert to fraction form
    139,367.88/192,327.84 = 75,705.66/x
  3. Step 3: Cross multiply
    139,367.88x = 192,327.84 × 75,705.66
  4. Step 4: Simplify right side
    139,367.88x = 14,560,306,063.57
  5. Step 5: Solve for x
    x = 14,560,306,063.57/139,367.88
  6. Step 6: Final answer
    x = 104,473.90

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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.