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Finding the Fourth Proportional to 61,366.80, 91,920.60 and 54,800.40

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Solution

The fourth proportional to 61,366.80, 91,920.60 and 54,800.40 is: 82,084.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,366.80 : 91,920.60 = 54,800.40 : x
  2. Step 2: Convert to fraction form
    61,366.80/91,920.60 = 54,800.40/x
  3. Step 3: Cross multiply
    61,366.80x = 91,920.60 × 54,800.40
  4. Step 4: Simplify right side
    61,366.80x = 5,037,285,648.24
  5. Step 5: Solve for x
    x = 5,037,285,648.24/61,366.80
  6. Step 6: Final answer
    x = 82,084.87

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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.