Home / 259,542.40-389,265.60-72,515.20

Finding the Fourth Proportional to 259,542.40, 389,265.60 and 72,515.20

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Solution

The fourth proportional to 259,542.40, 389,265.60 and 72,515.20 is: 108,759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,542.40 : 389,265.60 = 72,515.20 : x
  2. Step 2: Convert to fraction form
    259,542.40/389,265.60 = 72,515.20/x
  3. Step 3: Cross multiply
    259,542.40x = 389,265.60 × 72,515.20
  4. Step 4: Simplify right side
    259,542.40x = 28,227,672,837.12
  5. Step 5: Solve for x
    x = 28,227,672,837.12/259,542.40
  6. Step 6: Final answer
    x = 108,759.39

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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.