Home / 81,230.20-121,845.30-80,063.80

Finding the Fourth Proportional to 81,230.20, 121,845.30 and 80,063.80

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Solution

The fourth proportional to 81,230.20, 121,845.30 and 80,063.80 is: 120,095.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.20 : 121,845.30 = 80,063.80 : x
  2. Step 2: Convert to fraction form
    81,230.20/121,845.30 = 80,063.80/x
  3. Step 3: Cross multiply
    81,230.20x = 121,845.30 × 80,063.80
  4. Step 4: Simplify right side
    81,230.20x = 9,755,397,730.14
  5. Step 5: Solve for x
    x = 9,755,397,730.14/81,230.20
  6. Step 6: Final answer
    x = 120,095.70

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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.