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Finding the Fourth Proportional to 78,712.31, 108,625.91 and 44,726.55

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Solution

The fourth proportional to 78,712.31, 108,625.91 and 44,726.55 is: 61,724.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,712.31 : 108,625.91 = 44,726.55 : x
  2. Step 2: Convert to fraction form
    78,712.31/108,625.91 = 44,726.55/x
  3. Step 3: Cross multiply
    78,712.31x = 108,625.91 × 44,726.55
  4. Step 4: Simplify right side
    78,712.31x = 4,858,462,732.05
  5. Step 5: Solve for x
    x = 4,858,462,732.05/78,712.31
  6. Step 6: Final answer
    x = 61,724.31

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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.