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Finding the Fourth Proportional to 80,377,999.80, 120,566,999.70 and 25,790,479.80

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Solution

The fourth proportional to 80,377,999.80, 120,566,999.70 and 25,790,479.80 is: 38,685,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,377,999.80 : 120,566,999.70 = 25,790,479.80 : x
  2. Step 2: Convert to fraction form
    80,377,999.80/120,566,999.70 = 25,790,479.80/x
  3. Step 3: Cross multiply
    80,377,999.80x = 120,566,999.70 × 25,790,479.80
  4. Step 4: Simplify right side
    80,377,999.80x = 3,109,480,770,309,456
  5. Step 5: Solve for x
    x = 3,109,480,770,309,456/80,377,999.80
  6. Step 6: Final answer
    x = 38,685,719.70

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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.