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Finding the Fourth Proportional to 67,906.11, 101,859.18 and 21,162.63

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Solution

The fourth proportional to 67,906.11, 101,859.18 and 21,162.63 is: 31,743.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,906.11 : 101,859.18 = 21,162.63 : x
  2. Step 2: Convert to fraction form
    67,906.11/101,859.18 = 21,162.63/x
  3. Step 3: Cross multiply
    67,906.11x = 101,859.18 × 21,162.63
  4. Step 4: Simplify right side
    67,906.11x = 2,155,608,138.44
  5. Step 5: Solve for x
    x = 2,155,608,138.44/67,906.11
  6. Step 6: Final answer
    x = 31,743.95

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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.