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Finding the Fourth Proportional to 111,579.51, 153,912.11 and 66,227.61

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Solution

The fourth proportional to 111,579.51, 153,912.11 and 66,227.61 is: 91,353.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,579.51 : 153,912.11 = 66,227.61 : x
  2. Step 2: Convert to fraction form
    111,579.51/153,912.11 = 66,227.61/x
  3. Step 3: Cross multiply
    111,579.51x = 153,912.11 × 66,227.61
  4. Step 4: Simplify right side
    111,579.51x = 10,193,230,864.22
  5. Step 5: Solve for x
    x = 10,193,230,864.22/111,579.51
  6. Step 6: Final answer
    x = 91,353.97

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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.