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Finding the Fourth Proportional to 80,828.43, 111,546.70 and 45,018.45

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Solution

The fourth proportional to 80,828.43, 111,546.70 and 45,018.45 is: 62,127.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,828.43 : 111,546.70 = 45,018.45 : x
  2. Step 2: Convert to fraction form
    80,828.43/111,546.70 = 45,018.45/x
  3. Step 3: Cross multiply
    80,828.43x = 111,546.70 × 45,018.45
  4. Step 4: Simplify right side
    80,828.43x = 5,021,659,311.52
  5. Step 5: Solve for x
    x = 5,021,659,311.52/80,828.43
  6. Step 6: Final answer
    x = 62,127.39

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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.