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Finding the Fourth Proportional to 68,873.65, 103,296.87 and 18,940.86

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Solution

The fourth proportional to 68,873.65, 103,296.87 and 18,940.86 is: 28,407.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,873.65 : 103,296.87 = 18,940.86 : x
  2. Step 2: Convert to fraction form
    68,873.65/103,296.87 = 18,940.86/x
  3. Step 3: Cross multiply
    68,873.65x = 103,296.87 × 18,940.86
  4. Step 4: Simplify right side
    68,873.65x = 1,956,531,553.11
  5. Step 5: Solve for x
    x = 1,956,531,553.11/68,873.65
  6. Step 6: Final answer
    x = 28,407.55

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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.