Home / 80,571,286.20-120,856,929.30-69,611,791.80

Finding the Fourth Proportional to 80,571,286.20, 120,856,929.30 and 69,611,791.80

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Solution

The fourth proportional to 80,571,286.20, 120,856,929.30 and 69,611,791.80 is: 104,417,687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,571,286.20 : 120,856,929.30 = 69,611,791.80 : x
  2. Step 2: Convert to fraction form
    80,571,286.20/120,856,929.30 = 69,611,791.80/x
  3. Step 3: Cross multiply
    80,571,286.20x = 120,856,929.30 × 69,611,791.80
  4. Step 4: Simplify right side
    80,571,286.20x = 8,413,067,400,018,919
  5. Step 5: Solve for x
    x = 8,413,067,400,018,919/80,571,286.20
  6. Step 6: Final answer
    x = 104,417,687.70

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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.