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Finding the Fourth Proportional to 80,487.94, 111,078.39 and 44,678.55

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Solution

The fourth proportional to 80,487.94, 111,078.39 and 44,678.55 is: 61,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,487.94 : 111,078.39 = 44,678.55 : x
  2. Step 2: Convert to fraction form
    80,487.94/111,078.39 = 44,678.55/x
  3. Step 3: Cross multiply
    80,487.94x = 111,078.39 × 44,678.55
  4. Step 4: Simplify right side
    80,487.94x = 4,962,821,401.53
  5. Step 5: Solve for x
    x = 4,962,821,401.53/80,487.94
  6. Step 6: Final answer
    x = 61,659.19

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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.