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Finding the Fourth Proportional to 259,717.88, 389,591.60 and 72,743.96

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Solution

The fourth proportional to 259,717.88, 389,591.60 and 72,743.96 is: 109,120.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,717.88 : 389,591.60 = 72,743.96 : x
  2. Step 2: Convert to fraction form
    259,717.88/389,591.60 = 72,743.96/x
  3. Step 3: Cross multiply
    259,717.88x = 389,591.60 × 72,743.96
  4. Step 4: Simplify right side
    259,717.88x = 28,340,433,455.06
  5. Step 5: Solve for x
    x = 28,340,433,455.06/259,717.88
  6. Step 6: Final answer
    x = 109,120.07

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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.