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Finding the Fourth Proportional to 259,523.61, 389,265.97 and 72,549.69

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Solution

The fourth proportional to 259,523.61, 389,265.97 and 72,549.69 is: 108,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,523.61 : 389,265.97 = 72,549.69 : x
  2. Step 2: Convert to fraction form
    259,523.61/389,265.97 = 72,549.69/x
  3. Step 3: Cross multiply
    259,523.61x = 389,265.97 × 72,549.69
  4. Step 4: Simplify right side
    259,523.61x = 28,241,125,451.05
  5. Step 5: Solve for x
    x = 28,241,125,451.05/259,523.61
  6. Step 6: Final answer
    x = 108,819.10

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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.