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Finding the Fourth Proportional to 67,791.80, 101,687.70 and 18,543.80

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Solution

The fourth proportional to 67,791.80, 101,687.70 and 18,543.80 is: 27,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,791.80 : 101,687.70 = 18,543.80 : x
  2. Step 2: Convert to fraction form
    67,791.80/101,687.70 = 18,543.80/x
  3. Step 3: Cross multiply
    67,791.80x = 101,687.70 × 18,543.80
  4. Step 4: Simplify right side
    67,791.80x = 1,885,676,371.26
  5. Step 5: Solve for x
    x = 1,885,676,371.26/67,791.80
  6. Step 6: Final answer
    x = 27,815.70

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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.