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Finding the Fourth Proportional to 68,754.21, 103,131.40 and 18,834.73

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Solution

The fourth proportional to 68,754.21, 103,131.40 and 18,834.73 is: 28,252.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,754.21 : 103,131.40 = 18,834.73 : x
  2. Step 2: Convert to fraction form
    68,754.21/103,131.40 = 18,834.73/x
  3. Step 3: Cross multiply
    68,754.21x = 103,131.40 × 18,834.73
  4. Step 4: Simplify right side
    68,754.21x = 1,942,452,237.18
  5. Step 5: Solve for x
    x = 1,942,452,237.18/68,754.21
  6. Step 6: Final answer
    x = 28,252.12

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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.