Home / 259,711.20-389,493.90-82,272.60

Finding the Fourth Proportional to 259,711.20, 389,493.90 and 82,272.60

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Solution

The fourth proportional to 259,711.20, 389,493.90 and 82,272.60 is: 123,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.20 : 389,493.90 = 82,272.60 : x
  2. Step 2: Convert to fraction form
    259,711.20/389,493.90 = 82,272.60/x
  3. Step 3: Cross multiply
    259,711.20x = 389,493.90 × 82,272.60
  4. Step 4: Simplify right side
    259,711.20x = 32,044,675,837.14
  5. Step 5: Solve for x
    x = 32,044,675,837.14/259,711.20
  6. Step 6: Final answer
    x = 123,385.81

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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.