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Finding the Fourth Proportional to 84,061.86, 115,968.60 and 55,344.48

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Solution

The fourth proportional to 84,061.86, 115,968.60 and 55,344.48 is: 76,351.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,061.86 : 115,968.60 = 55,344.48 : x
  2. Step 2: Convert to fraction form
    84,061.86/115,968.60 = 55,344.48/x
  3. Step 3: Cross multiply
    84,061.86x = 115,968.60 × 55,344.48
  4. Step 4: Simplify right side
    84,061.86x = 6,418,221,863.33
  5. Step 5: Solve for x
    x = 6,418,221,863.33/84,061.86
  6. Step 6: Final answer
    x = 76,351.18

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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.