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Finding the Fourth Proportional to 74,714.50, 111,947.19 and 61,428.48

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Solution

The fourth proportional to 74,714.50, 111,947.19 and 61,428.48 is: 92,040.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,714.50 : 111,947.19 = 61,428.48 : x
  2. Step 2: Convert to fraction form
    74,714.50/111,947.19 = 61,428.48/x
  3. Step 3: Cross multiply
    74,714.50x = 111,947.19 × 61,428.48
  4. Step 4: Simplify right side
    74,714.50x = 6,876,745,721.97
  5. Step 5: Solve for x
    x = 6,876,745,721.97/74,714.50
  6. Step 6: Final answer
    x = 92,040.31

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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.