Home / 259,576.76-389,413.20-82,128.44

Finding the Fourth Proportional to 259,576.76, 389,413.20 and 82,128.44

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Solution

The fourth proportional to 259,576.76, 389,413.20 and 82,128.44 is: 123,207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,576.76 : 389,413.20 = 82,128.44 : x
  2. Step 2: Convert to fraction form
    259,576.76/389,413.20 = 82,128.44/x
  3. Step 3: Cross multiply
    259,576.76x = 389,413.20 × 82,128.44
  4. Step 4: Simplify right side
    259,576.76x = 31,981,898,631.41
  5. Step 5: Solve for x
    x = 31,981,898,631.41/259,576.76
  6. Step 6: Final answer
    x = 123,207.87

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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.