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Finding the Fourth Proportional to 70,542.53, 105,751.49 and 53,976.51

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Solution

The fourth proportional to 70,542.53, 105,751.49 and 53,976.51 is: 80,917.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,542.53 : 105,751.49 = 53,976.51 : x
  2. Step 2: Convert to fraction form
    70,542.53/105,751.49 = 53,976.51/x
  3. Step 3: Cross multiply
    70,542.53x = 105,751.49 × 53,976.51
  4. Step 4: Simplify right side
    70,542.53x = 5,708,096,087.62
  5. Step 5: Solve for x
    x = 5,708,096,087.62/70,542.53
  6. Step 6: Final answer
    x = 80,917.09

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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.