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Finding the Fourth Proportional to 68,753.75, 103,130.71 and 18,834.28

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Solution

The fourth proportional to 68,753.75, 103,130.71 and 18,834.28 is: 28,251.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,753.75 : 103,130.71 = 18,834.28 : x
  2. Step 2: Convert to fraction form
    68,753.75/103,130.71 = 18,834.28/x
  3. Step 3: Cross multiply
    68,753.75x = 103,130.71 × 18,834.28
  4. Step 4: Simplify right side
    68,753.75x = 1,942,393,049.88
  5. Step 5: Solve for x
    x = 1,942,393,049.88/68,753.75
  6. Step 6: Final answer
    x = 28,251.45

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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.