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Finding the Fourth Proportional to 68,842.45, 103,251.75 and 18,910.65

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Solution

The fourth proportional to 68,842.45, 103,251.75 and 18,910.65 is: 28,362.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,842.45 : 103,251.75 = 18,910.65 : x
  2. Step 2: Convert to fraction form
    68,842.45/103,251.75 = 18,910.65/x
  3. Step 3: Cross multiply
    68,842.45x = 103,251.75 × 18,910.65
  4. Step 4: Simplify right side
    68,842.45x = 1,952,557,706.14
  5. Step 5: Solve for x
    x = 1,952,557,706.14/68,842.45
  6. Step 6: Final answer
    x = 28,362.70

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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.