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Finding the Fourth Proportional to 68,754.34, 103,131.60 and 18,834.87

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Solution

The fourth proportional to 68,754.34, 103,131.60 and 18,834.87 is: 28,252.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,754.34 : 103,131.60 = 18,834.87 : x
  2. Step 2: Convert to fraction form
    68,754.34/103,131.60 = 18,834.87/x
  3. Step 3: Cross multiply
    68,754.34x = 103,131.60 × 18,834.87
  4. Step 4: Simplify right side
    68,754.34x = 1,942,470,278.89
  5. Step 5: Solve for x
    x = 1,942,470,278.89/68,754.34
  6. Step 6: Final answer
    x = 28,252.33

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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.