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Finding the Fourth Proportional to 259,600.20, 389,359.80 and 82,150.80

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Solution

The fourth proportional to 259,600.20, 389,359.80 and 82,150.80 is: 123,213.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,600.20 : 389,359.80 = 82,150.80 : x
  2. Step 2: Convert to fraction form
    259,600.20/389,359.80 = 82,150.80/x
  3. Step 3: Cross multiply
    259,600.20x = 389,359.80 × 82,150.80
  4. Step 4: Simplify right side
    259,600.20x = 31,986,219,057.84
  5. Step 5: Solve for x
    x = 31,986,219,057.84/259,600.20
  6. Step 6: Final answer
    x = 123,213.38

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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.