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Finding the Fourth Proportional to 67,286.64, 100,945.92 and 20,536.56

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Solution

The fourth proportional to 67,286.64, 100,945.92 and 20,536.56 is: 30,809.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,286.64 : 100,945.92 = 20,536.56 : x
  2. Step 2: Convert to fraction form
    67,286.64/100,945.92 = 20,536.56/x
  3. Step 3: Cross multiply
    67,286.64x = 100,945.92 × 20,536.56
  4. Step 4: Simplify right side
    67,286.64x = 2,073,081,942.84
  5. Step 5: Solve for x
    x = 2,073,081,942.84/67,286.64
  6. Step 6: Final answer
    x = 30,809.71

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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.