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Finding the Fourth Proportional to 139,474.20, 192,473.20 and 75,811.80

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Solution

The fourth proportional to 139,474.20, 192,473.20 and 75,811.80 is: 104,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,474.20 : 192,473.20 = 75,811.80 : x
  2. Step 2: Convert to fraction form
    139,474.20/192,473.20 = 75,811.80/x
  3. Step 3: Cross multiply
    139,474.20x = 192,473.20 × 75,811.80
  4. Step 4: Simplify right side
    139,474.20x = 14,591,739,743.76
  5. Step 5: Solve for x
    x = 14,591,739,743.76/139,474.20
  6. Step 6: Final answer
    x = 104,619.63

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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.