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Finding the Fourth Proportional to 68,672,662.65, 103,128,568.20 and 36,387,621.90

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Solution

The fourth proportional to 68,672,662.65, 103,128,568.20 and 36,387,621.90 is: 54,644,791.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,672,662.65 : 103,128,568.20 = 36,387,621.90 : x
  2. Step 2: Convert to fraction form
    68,672,662.65/103,128,568.20 = 36,387,621.90/x
  3. Step 3: Cross multiply
    68,672,662.65x = 103,128,568.20 × 36,387,621.90
  4. Step 4: Simplify right side
    68,672,662.65x = 3,752,603,346,749,963.50
  5. Step 5: Solve for x
    x = 3,752,603,346,749,963.50/68,672,662.65
  6. Step 6: Final answer
    x = 54,644,791.71

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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.