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Finding the Fourth Proportional to 67,230.28, 100,860.54 and 20,487.88

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Solution

The fourth proportional to 67,230.28, 100,860.54 and 20,487.88 is: 30,736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,230.28 : 100,860.54 = 20,487.88 : x
  2. Step 2: Convert to fraction form
    67,230.28/100,860.54 = 20,487.88/x
  3. Step 3: Cross multiply
    67,230.28x = 100,860.54 × 20,487.88
  4. Step 4: Simplify right side
    67,230.28x = 2,066,418,640.26
  5. Step 5: Solve for x
    x = 2,066,418,640.26/67,230.28
  6. Step 6: Final answer
    x = 30,736.43

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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.