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Finding the Fourth Proportional to 66,920,809.20, 100,381,213.80 and 49,914,697.20

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Solution

The fourth proportional to 66,920,809.20, 100,381,213.80 and 49,914,697.20 is: 74,872,045.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920,809.20 : 100,381,213.80 = 49,914,697.20 : x
  2. Step 2: Convert to fraction form
    66,920,809.20/100,381,213.80 = 49,914,697.20/x
  3. Step 3: Cross multiply
    66,920,809.20x = 100,381,213.80 × 49,914,697.20
  4. Step 4: Simplify right side
    66,920,809.20x = 5,010,497,891,395,462
  5. Step 5: Solve for x
    x = 5,010,497,891,395,462/66,920,809.20
  6. Step 6: Final answer
    x = 74,872,045.80

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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.