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Finding the Fourth Proportional to 53,772.68, 80,691.42 and 18,736.94

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Solution

The fourth proportional to 53,772.68, 80,691.42 and 18,736.94 is: 28,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,772.68 : 80,691.42 = 18,736.94 : x
  2. Step 2: Convert to fraction form
    53,772.68/80,691.42 = 18,736.94/x
  3. Step 3: Cross multiply
    53,772.68x = 80,691.42 × 18,736.94
  4. Step 4: Simplify right side
    53,772.68x = 1,511,910,295.05
  5. Step 5: Solve for x
    x = 1,511,910,295.05/53,772.68
  6. Step 6: Final answer
    x = 28,116.70

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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.