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Finding the Fourth Proportional to 68,811.82, 103,217.19 and 18,891.73

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Solution

The fourth proportional to 68,811.82, 103,217.19 and 18,891.73 is: 28,337.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811.82 : 103,217.19 = 18,891.73 : x
  2. Step 2: Convert to fraction form
    68,811.82/103,217.19 = 18,891.73/x
  3. Step 3: Cross multiply
    68,811.82x = 103,217.19 × 18,891.73
  4. Step 4: Simplify right side
    68,811.82x = 1,949,951,284.84
  5. Step 5: Solve for x
    x = 1,949,951,284.84/68,811.82
  6. Step 6: Final answer
    x = 28,337.45

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1.5x scale

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.