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Finding the Fourth Proportional to 8,161,978.20, 12,243,428.10 and 2,482,387.80

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Solution

The fourth proportional to 8,161,978.20, 12,243,428.10 and 2,482,387.80 is: 3,723,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,161,978.20 : 12,243,428.10 = 2,482,387.80 : x
  2. Step 2: Convert to fraction form
    8,161,978.20/12,243,428.10 = 2,482,387.80/x
  3. Step 3: Cross multiply
    8,161,978.20x = 12,243,428.10 × 2,482,387.80
  4. Step 4: Simplify right side
    8,161,978.20x = 30,392,936,545,617.18
  5. Step 5: Solve for x
    x = 30,392,936,545,617.18/8,161,978.20
  6. Step 6: Final answer
    x = 3,723,721.85

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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.