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Finding the Fourth Proportional to 139,566,489.78, 209,372,475.33 and 41,208,138.89

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Solution

The fourth proportional to 139,566,489.78, 209,372,475.33 and 41,208,138.89 is: 61,818,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,566,489.78 : 209,372,475.33 = 41,208,138.89 : x
  2. Step 2: Convert to fraction form
    139,566,489.78/209,372,475.33 = 41,208,138.89/x
  3. Step 3: Cross multiply
    139,566,489.78x = 209,372,475.33 × 41,208,138.89
  4. Step 4: Simplify right side
    139,566,489.78x = 8,627,850,042,999,749
  5. Step 5: Solve for x
    x = 8,627,850,042,999,749/139,566,489.78
  6. Step 6: Final answer
    x = 61,818,922.70

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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.