Home / 80,456,743.90-120,685,115.85-19,872,469.90

Finding the Fourth Proportional to 80,456,743.90, 120,685,115.85 and 19,872,469.90

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Solution

The fourth proportional to 80,456,743.90, 120,685,115.85 and 19,872,469.90 is: 29,808,704.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,456,743.90 : 120,685,115.85 = 19,872,469.90 : x
  2. Step 2: Convert to fraction form
    80,456,743.90/120,685,115.85 = 19,872,469.90/x
  3. Step 3: Cross multiply
    80,456,743.90x = 120,685,115.85 × 19,872,469.90
  4. Step 4: Simplify right side
    80,456,743.90x = 2,398,311,332,107,137.50
  5. Step 5: Solve for x
    x = 2,398,311,332,107,137.50/80,456,743.90
  6. Step 6: Final answer
    x = 29,808,704.85

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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.