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Finding the Fourth Proportional to 263,722.20, 395,388.90 and 113,839.80

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Solution

The fourth proportional to 263,722.20, 395,388.90 and 113,839.80 is: 170,675.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,722.20 : 395,388.90 = 113,839.80 : x
  2. Step 2: Convert to fraction form
    263,722.20/395,388.90 = 113,839.80/x
  3. Step 3: Cross multiply
    263,722.20x = 395,388.90 × 113,839.80
  4. Step 4: Simplify right side
    263,722.20x = 45,010,993,298.22
  5. Step 5: Solve for x
    x = 45,010,993,298.22/263,722.20
  6. Step 6: Final answer
    x = 170,675.78

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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.