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Finding the Fourth Proportional to 81,894.58, 122,845.36 and 28,591.92

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Solution

The fourth proportional to 81,894.58, 122,845.36 and 28,591.92 is: 42,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,894.58 : 122,845.36 = 28,591.92 : x
  2. Step 2: Convert to fraction form
    81,894.58/122,845.36 = 28,591.92/x
  3. Step 3: Cross multiply
    81,894.58x = 122,845.36 × 28,591.92
  4. Step 4: Simplify right side
    81,894.58x = 3,512,384,634.01
  5. Step 5: Solve for x
    x = 3,512,384,634.01/81,894.58
  6. Step 6: Final answer
    x = 42,889.10

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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.