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Finding the Fourth Proportional to 80,247,687.90, 120,371,531.85 and 51,549,873.90

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Solution

The fourth proportional to 80,247,687.90, 120,371,531.85 and 51,549,873.90 is: 77,324,810.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,247,687.90 : 120,371,531.85 = 51,549,873.90 : x
  2. Step 2: Convert to fraction form
    80,247,687.90/120,371,531.85 = 51,549,873.90/x
  3. Step 3: Cross multiply
    80,247,687.90x = 120,371,531.85 × 51,549,873.90
  4. Step 4: Simplify right side
    80,247,687.90x = 6,205,137,288,017,333
  5. Step 5: Solve for x
    x = 6,205,137,288,017,333/80,247,687.90
  6. Step 6: Final answer
    x = 77,324,810.85

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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.