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Finding the Fourth Proportional to 57,081.22, 78,787.92 and 33,212.51

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Solution

The fourth proportional to 57,081.22, 78,787.92 and 33,212.51 is: 45,842.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,081.22 : 78,787.92 = 33,212.51 : x
  2. Step 2: Convert to fraction form
    57,081.22/78,787.92 = 33,212.51/x
  3. Step 3: Cross multiply
    57,081.22x = 78,787.92 × 33,212.51
  4. Step 4: Simplify right side
    57,081.22x = 2,616,744,580.88
  5. Step 5: Solve for x
    x = 2,616,744,580.88/57,081.22
  6. Step 6: Final answer
    x = 45,842.48

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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.