Home / 259,719.40-389,615.55-82,207.90

Finding the Fourth Proportional to 259,719.40, 389,615.55 and 82,207.90

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Solution

The fourth proportional to 259,719.40, 389,615.55 and 82,207.90 is: 123,323.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,719.40 : 389,615.55 = 82,207.90 : x
  2. Step 2: Convert to fraction form
    259,719.40/389,615.55 = 82,207.90/x
  3. Step 3: Cross multiply
    259,719.40x = 389,615.55 × 82,207.90
  4. Step 4: Simplify right side
    259,719.40x = 32,029,476,172.85
  5. Step 5: Solve for x
    x = 32,029,476,172.85/259,719.40
  6. Step 6: Final answer
    x = 123,323.39

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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.