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Finding the Fourth Proportional to 61,149.22, 84,422.73 and 39,963.94

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Solution

The fourth proportional to 61,149.22, 84,422.73 and 39,963.94 is: 55,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,149.22 : 84,422.73 = 39,963.94 : x
  2. Step 2: Convert to fraction form
    61,149.22/84,422.73 = 39,963.94/x
  3. Step 3: Cross multiply
    61,149.22x = 84,422.73 × 39,963.94
  4. Step 4: Simplify right side
    61,149.22x = 3,373,864,916.36
  5. Step 5: Solve for x
    x = 3,373,864,916.36/61,149.22
  6. Step 6: Final answer
    x = 55,174.29

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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.