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Finding the Fourth Proportional to 66,957,980.78, 100,241,860.39 and 49,762,321.49

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Solution

The fourth proportional to 66,957,980.78, 100,241,860.39 and 49,762,321.49 is: 74,498,478.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,957,980.78 : 100,241,860.39 = 49,762,321.49 : x
  2. Step 2: Convert to fraction form
    66,957,980.78/100,241,860.39 = 49,762,321.49/x
  3. Step 3: Cross multiply
    66,957,980.78x = 100,241,860.39 × 49,762,321.49
  4. Step 4: Simplify right side
    66,957,980.78x = 4,988,267,683,482,877
  5. Step 5: Solve for x
    x = 4,988,267,683,482,877/66,957,980.78
  6. Step 6: Final answer
    x = 74,498,478.38

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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.