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Finding the Fourth Proportional to 68,891.73, 103,338.15 and 18,974.58

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Solution

The fourth proportional to 68,891.73, 103,338.15 and 18,974.58 is: 28,462.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,891.73 : 103,338.15 = 18,974.58 : x
  2. Step 2: Convert to fraction form
    68,891.73/103,338.15 = 18,974.58/x
  3. Step 3: Cross multiply
    68,891.73x = 103,338.15 × 18,974.58
  4. Step 4: Simplify right side
    68,891.73x = 1,960,797,994.23
  5. Step 5: Solve for x
    x = 1,960,797,994.23/68,891.73
  6. Step 6: Final answer
    x = 28,462.02

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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.