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Finding the Fourth Proportional to 67,305, 100,986.66 and 36,103.80

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Solution

The fourth proportional to 67,305, 100,986.66 and 36,103.80 is: 54,171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,305 : 100,986.66 = 36,103.80 : x
  2. Step 2: Convert to fraction form
    67,305/100,986.66 = 36,103.80/x
  3. Step 3: Cross multiply
    67,305x = 100,986.66 × 36,103.80
  4. Step 4: Simplify right side
    67,305x = 3,646,002,175.31
  5. Step 5: Solve for x
    x = 3,646,002,175.31/67,305
  6. Step 6: Final answer
    x = 54,171.34

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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.