Home / 80,890.20-121,335.30-73,891.80

Finding the Fourth Proportional to 80,890.20, 121,335.30 and 73,891.80

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Solution

The fourth proportional to 80,890.20, 121,335.30 and 73,891.80 is: 110,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,890.20 : 121,335.30 = 73,891.80 : x
  2. Step 2: Convert to fraction form
    80,890.20/121,335.30 = 73,891.80/x
  3. Step 3: Cross multiply
    80,890.20x = 121,335.30 × 73,891.80
  4. Step 4: Simplify right side
    80,890.20x = 8,965,683,720.54
  5. Step 5: Solve for x
    x = 8,965,683,720.54/80,890.20
  6. Step 6: Final answer
    x = 110,837.70

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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.