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Finding the Fourth Proportional to 67,236.52, 100,871 and 20,486.56

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Solution

The fourth proportional to 67,236.52, 100,871 and 20,486.56 is: 30,734.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,236.52 : 100,871 = 20,486.56 : x
  2. Step 2: Convert to fraction form
    67,236.52/100,871 = 20,486.56/x
  3. Step 3: Cross multiply
    67,236.52x = 100,871 × 20,486.56
  4. Step 4: Simplify right side
    67,236.52x = 2,066,499,793.76
  5. Step 5: Solve for x
    x = 2,066,499,793.76/67,236.52
  6. Step 6: Final answer
    x = 30,734.78

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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.