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Finding the Fourth Proportional to 139,978,872.45, 209,968,308.68 and 88,897,550.85

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Solution

The fourth proportional to 139,978,872.45, 209,968,308.68 and 88,897,550.85 is: 133,346,326.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,978,872.45 : 209,968,308.68 = 88,897,550.85 : x
  2. Step 2: Convert to fraction form
    139,978,872.45/209,968,308.68 = 88,897,550.85/x
  3. Step 3: Cross multiply
    139,978,872.45x = 209,968,308.68 × 88,897,550.85
  4. Step 4: Simplify right side
    139,978,872.45x = 18,665,668,397,324,308
  5. Step 5: Solve for x
    x = 18,665,668,397,324,308/139,978,872.45
  6. Step 6: Final answer
    x = 133,346,326.28

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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.