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Finding the Fourth Proportional to 81,504.20, 113,872.60 and 81,504.20

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Solution

The fourth proportional to 81,504.20, 113,872.60 and 81,504.20 is: 113,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,504.20 : 113,872.60 = 81,504.20 : x
  2. Step 2: Convert to fraction form
    81,504.20/113,872.60 = 81,504.20/x
  3. Step 3: Cross multiply
    81,504.20x = 113,872.60 × 81,504.20
  4. Step 4: Simplify right side
    81,504.20x = 9,281,095,164.92
  5. Step 5: Solve for x
    x = 9,281,095,164.92/81,504.20
  6. Step 6: Final answer
    x = 113,872.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.