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Finding the Fourth Proportional to 67,221, 100,849.77 and 20,473.92

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Solution

The fourth proportional to 67,221, 100,849.77 and 20,473.92 is: 30,716.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,221 : 100,849.77 = 20,473.92 : x
  2. Step 2: Convert to fraction form
    67,221/100,849.77 = 20,473.92/x
  3. Step 3: Cross multiply
    67,221x = 100,849.77 × 20,473.92
  4. Step 4: Simplify right side
    67,221x = 2,064,790,123.00
  5. Step 5: Solve for x
    x = 2,064,790,123.00/67,221
  6. Step 6: Final answer
    x = 30,716.44

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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.