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Finding the Fourth Proportional to 66,957,979.78, 100,241,858.89 and 49,762,320.49

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Solution

The fourth proportional to 66,957,979.78, 100,241,858.89 and 49,762,320.49 is: 74,498,476.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,957,979.78 : 100,241,858.89 = 49,762,320.49 : x
  2. Step 2: Convert to fraction form
    66,957,979.78/100,241,858.89 = 49,762,320.49/x
  3. Step 3: Cross multiply
    66,957,979.78x = 100,241,858.89 × 49,762,320.49
  4. Step 4: Simplify right side
    66,957,979.78x = 4,988,267,508,597,536
  5. Step 5: Solve for x
    x = 4,988,267,508,597,536/66,957,979.78
  6. Step 6: Final answer
    x = 74,498,476.88

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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.