Home / 80,856.20-121,284.30-73,857.80

Finding the Fourth Proportional to 80,856.20, 121,284.30 and 73,857.80

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Solution

The fourth proportional to 80,856.20, 121,284.30 and 73,857.80 is: 110,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,856.20 : 121,284.30 = 73,857.80 : x
  2. Step 2: Convert to fraction form
    80,856.20/121,284.30 = 73,857.80/x
  3. Step 3: Cross multiply
    80,856.20x = 121,284.30 × 73,857.80
  4. Step 4: Simplify right side
    80,856.20x = 8,957,791,572.54
  5. Step 5: Solve for x
    x = 8,957,791,572.54/80,856.20
  6. Step 6: Final answer
    x = 110,786.70

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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.