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Finding the Fourth Proportional to 259,375.86, 389,100.18 and 90,857.60

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Solution

The fourth proportional to 259,375.86, 389,100.18 and 90,857.60 is: 136,299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,375.86 : 389,100.18 = 90,857.60 : x
  2. Step 2: Convert to fraction form
    259,375.86/389,100.18 = 90,857.60/x
  3. Step 3: Cross multiply
    259,375.86x = 389,100.18 × 90,857.60
  4. Step 4: Simplify right side
    259,375.86x = 35,352,707,882.33
  5. Step 5: Solve for x
    x = 35,352,707,882.33/259,375.86
  6. Step 6: Final answer
    x = 136,299.15

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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.