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Finding the Fourth Proportional to 45,481.96, 68,109 and 28,791.64

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Solution

The fourth proportional to 45,481.96, 68,109 and 28,791.64 is: 43,115.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,481.96 : 68,109 = 28,791.64 : x
  2. Step 2: Convert to fraction form
    45,481.96/68,109 = 28,791.64/x
  3. Step 3: Cross multiply
    45,481.96x = 68,109 × 28,791.64
  4. Step 4: Simplify right side
    45,481.96x = 1,960,969,808.76
  5. Step 5: Solve for x
    x = 1,960,969,808.76/45,481.96
  6. Step 6: Final answer
    x = 43,115.33

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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.