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Finding the Fourth Proportional to 67,003.59, 100,519.97 and 20,255.25

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Solution

The fourth proportional to 67,003.59, 100,519.97 and 20,255.25 is: 30,387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,003.59 : 100,519.97 = 20,255.25 : x
  2. Step 2: Convert to fraction form
    67,003.59/100,519.97 = 20,255.25/x
  3. Step 3: Cross multiply
    67,003.59x = 100,519.97 × 20,255.25
  4. Step 4: Simplify right side
    67,003.59x = 2,036,057,021.07
  5. Step 5: Solve for x
    x = 2,036,057,021.07/67,003.59
  6. Step 6: Final answer
    x = 30,387.28

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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.