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Finding the Fourth Proportional to 67,184.85, 100,791.85 and 20,436.51

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Solution

The fourth proportional to 67,184.85, 100,791.85 and 20,436.51 is: 30,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,184.85 : 100,791.85 = 20,436.51 : x
  2. Step 2: Convert to fraction form
    67,184.85/100,791.85 = 20,436.51/x
  3. Step 3: Cross multiply
    67,184.85x = 100,791.85 × 20,436.51
  4. Step 4: Simplify right side
    67,184.85x = 2,059,833,044.30
  5. Step 5: Solve for x
    x = 2,059,833,044.30/67,184.85
  6. Step 6: Final answer
    x = 30,659.19

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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.