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Finding the Fourth Proportional to 83,866.85, 125,858.60 and 54,211.13

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Solution

The fourth proportional to 83,866.85, 125,858.60 and 54,211.13 is: 81,354.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,866.85 : 125,858.60 = 54,211.13 : x
  2. Step 2: Convert to fraction form
    83,866.85/125,858.60 = 54,211.13/x
  3. Step 3: Cross multiply
    83,866.85x = 125,858.60 × 54,211.13
  4. Step 4: Simplify right side
    83,866.85x = 6,822,936,025.87
  5. Step 5: Solve for x
    x = 6,822,936,025.87/83,866.85
  6. Step 6: Final answer
    x = 81,354.39

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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.