Home / 259,568.20-389,279.40-82,129.60

Finding the Fourth Proportional to 259,568.20, 389,279.40 and 82,129.60

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Solution

The fourth proportional to 259,568.20, 389,279.40 and 82,129.60 is: 123,171.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,568.20 : 389,279.40 = 82,129.60 : x
  2. Step 2: Convert to fraction form
    259,568.20/389,279.40 = 82,129.60/x
  3. Step 3: Cross multiply
    259,568.20x = 389,279.40 × 82,129.60
  4. Step 4: Simplify right side
    259,568.20x = 31,971,361,410.24
  5. Step 5: Solve for x
    x = 31,971,361,410.24/259,568.20
  6. Step 6: Final answer
    x = 123,171.33

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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.