Home / 259,615.40-389,459.55-82,103.90

Finding the Fourth Proportional to 259,615.40, 389,459.55 and 82,103.90

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Solution

The fourth proportional to 259,615.40, 389,459.55 and 82,103.90 is: 123,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,615.40 : 389,459.55 = 82,103.90 : x
  2. Step 2: Convert to fraction form
    259,615.40/389,459.55 = 82,103.90/x
  3. Step 3: Cross multiply
    259,615.40x = 389,459.55 × 82,103.90
  4. Step 4: Simplify right side
    259,615.40x = 31,976,147,947.25
  5. Step 5: Solve for x
    x = 31,976,147,947.25/259,615.40
  6. Step 6: Final answer
    x = 123,167.38

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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.