Home / 131,470.20-197,205.30-81,387.90

Finding the Fourth Proportional to 131,470.20, 197,205.30 and 81,387.90

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Solution

The fourth proportional to 131,470.20, 197,205.30 and 81,387.90 is: 122,081.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,470.20 : 197,205.30 = 81,387.90 : x
  2. Step 2: Convert to fraction form
    131,470.20/197,205.30 = 81,387.90/x
  3. Step 3: Cross multiply
    131,470.20x = 197,205.30 × 81,387.90
  4. Step 4: Simplify right side
    131,470.20x = 16,050,125,235.87
  5. Step 5: Solve for x
    x = 16,050,125,235.87/131,470.20
  6. Step 6: Final answer
    x = 122,081.85

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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.