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Finding the Fourth Proportional to 139,963.48, 209,938.82 and 45,198.04

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Solution

The fourth proportional to 139,963.48, 209,938.82 and 45,198.04 is: 67,794.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,963.48 : 209,938.82 = 45,198.04 : x
  2. Step 2: Convert to fraction form
    139,963.48/209,938.82 = 45,198.04/x
  3. Step 3: Cross multiply
    139,963.48x = 209,938.82 × 45,198.04
  4. Step 4: Simplify right side
    139,963.48x = 9,488,823,183.91
  5. Step 5: Solve for x
    x = 9,488,823,183.91/139,963.48
  6. Step 6: Final answer
    x = 67,794.99

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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.