Home / 259,578.72-389,365.62-82,085.76

Finding the Fourth Proportional to 259,578.72, 389,365.62 and 82,085.76

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Solution

The fourth proportional to 259,578.72, 389,365.62 and 82,085.76 is: 123,127.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,578.72 : 389,365.62 = 82,085.76 : x
  2. Step 2: Convert to fraction form
    259,578.72/389,365.62 = 82,085.76/x
  3. Step 3: Cross multiply
    259,578.72x = 389,365.62 × 82,085.76
  4. Step 4: Simplify right side
    259,578.72x = 31,961,372,835.57
  5. Step 5: Solve for x
    x = 31,961,372,835.57/259,578.72
  6. Step 6: Final answer
    x = 123,127.86

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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.