Home / 80,743.13-121,033.27-50,778.78

Finding the Fourth Proportional to 80,743.13, 121,033.27 and 50,778.78

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Solution

The fourth proportional to 80,743.13, 121,033.27 and 50,778.78 is: 76,116.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,743.13 : 121,033.27 = 50,778.78 : x
  2. Step 2: Convert to fraction form
    80,743.13/121,033.27 = 50,778.78/x
  3. Step 3: Cross multiply
    80,743.13x = 121,033.27 × 50,778.78
  4. Step 4: Simplify right side
    80,743.13x = 6,145,921,184.84
  5. Step 5: Solve for x
    x = 6,145,921,184.84/80,743.13
  6. Step 6: Final answer
    x = 76,116.96

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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.