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Finding the Fourth Proportional to 68,137.47, 102,198.41 and 18,221.46

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Solution

The fourth proportional to 68,137.47, 102,198.41 and 18,221.46 is: 27,330.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,137.47 : 102,198.41 = 18,221.46 : x
  2. Step 2: Convert to fraction form
    68,137.47/102,198.41 = 18,221.46/x
  3. Step 3: Cross multiply
    68,137.47x = 102,198.41 × 18,221.46
  4. Step 4: Simplify right side
    68,137.47x = 1,862,204,239.88
  5. Step 5: Solve for x
    x = 1,862,204,239.88/68,137.47
  6. Step 6: Final answer
    x = 27,330.11

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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.