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Finding the Fourth Proportional to 57,051.61, 78,721.68 and 33,179.29

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Solution

The fourth proportional to 57,051.61, 78,721.68 and 33,179.29 is: 45,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,051.61 : 78,721.68 = 33,179.29 : x
  2. Step 2: Convert to fraction form
    57,051.61/78,721.68 = 33,179.29/x
  3. Step 3: Cross multiply
    57,051.61x = 78,721.68 × 33,179.29
  4. Step 4: Simplify right side
    57,051.61x = 2,611,929,450.01
  5. Step 5: Solve for x
    x = 2,611,929,450.01/57,051.61
  6. Step 6: Final answer
    x = 45,781.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.