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Finding the Fourth Proportional to 68,878.72, 103,280.41 and 21,481.14

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Solution

The fourth proportional to 68,878.72, 103,280.41 and 21,481.14 is: 32,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.72 : 103,280.41 = 21,481.14 : x
  2. Step 2: Convert to fraction form
    68,878.72/103,280.41 = 21,481.14/x
  3. Step 3: Cross multiply
    68,878.72x = 103,280.41 × 21,481.14
  4. Step 4: Simplify right side
    68,878.72x = 2,218,580,946.47
  5. Step 5: Solve for x
    x = 2,218,580,946.47/68,878.72
  6. Step 6: Final answer
    x = 32,209.96

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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.