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Finding the Fourth Proportional to 259,894.72, 389,874.86 and 91,375.44

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Solution

The fourth proportional to 259,894.72, 389,874.86 and 91,375.44 is: 137,074.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,894.72 : 389,874.86 = 91,375.44 : x
  2. Step 2: Convert to fraction form
    259,894.72/389,874.86 = 91,375.44/x
  3. Step 3: Cross multiply
    259,894.72x = 389,874.86 × 91,375.44
  4. Step 4: Simplify right side
    259,894.72x = 35,624,986,877.44
  5. Step 5: Solve for x
    x = 35,624,986,877.44/259,894.72
  6. Step 6: Final answer
    x = 137,074.69

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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.