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Finding the Fourth Proportional to 80,744,693.70, 120,972,698.55 and 49,138,169.70

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Solution

The fourth proportional to 80,744,693.70, 120,972,698.55 and 49,138,169.70 is: 73,619,413.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,744,693.70 : 120,972,698.55 = 49,138,169.70 : x
  2. Step 2: Convert to fraction form
    80,744,693.70/120,972,698.55 = 49,138,169.70/x
  3. Step 3: Cross multiply
    80,744,693.70x = 120,972,698.55 × 49,138,169.70
  4. Step 4: Simplify right side
    80,744,693.70x = 5,944,376,990,416,844
  5. Step 5: Solve for x
    x = 5,944,376,990,416,844/80,744,693.70
  6. Step 6: Final answer
    x = 73,619,413.46

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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.