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Finding the Fourth Proportional to 139,744.88, 209,649.81 and 39,906.44

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Solution

The fourth proportional to 139,744.88, 209,649.81 and 39,906.44 is: 59,868.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,744.88 : 209,649.81 = 39,906.44 : x
  2. Step 2: Convert to fraction form
    139,744.88/209,649.81 = 39,906.44/x
  3. Step 3: Cross multiply
    139,744.88x = 209,649.81 × 39,906.44
  4. Step 4: Simplify right side
    139,744.88x = 8,366,377,563.78
  5. Step 5: Solve for x
    x = 8,366,377,563.78/139,744.88
  6. Step 6: Final answer
    x = 59,868.94

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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.