Home / 80,474.40-120,733.20-71,769.60

Finding the Fourth Proportional to 80,474.40, 120,733.20 and 71,769.60

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Solution

The fourth proportional to 80,474.40, 120,733.20 and 71,769.60 is: 107,673.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,474.40 : 120,733.20 = 71,769.60 : x
  2. Step 2: Convert to fraction form
    80,474.40/120,733.20 = 71,769.60/x
  3. Step 3: Cross multiply
    80,474.40x = 120,733.20 × 71,769.60
  4. Step 4: Simplify right side
    80,474.40x = 8,664,973,470.72
  5. Step 5: Solve for x
    x = 8,664,973,470.72/80,474.40
  6. Step 6: Final answer
    x = 107,673.66

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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.