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Finding the Fourth Proportional to 68,754.27, 103,131.49 and 18,834.80

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Solution

The fourth proportional to 68,754.27, 103,131.49 and 18,834.80 is: 28,252.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,754.27 : 103,131.49 = 18,834.80 : x
  2. Step 2: Convert to fraction form
    68,754.27/103,131.49 = 18,834.80/x
  3. Step 3: Cross multiply
    68,754.27x = 103,131.49 × 18,834.80
  4. Step 4: Simplify right side
    68,754.27x = 1,942,460,425.11
  5. Step 5: Solve for x
    x = 1,942,460,425.11/68,754.27
  6. Step 6: Final answer
    x = 28,252.22

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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.