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Finding the Fourth Proportional to 81,906.67, 113,066.09 and 55,064.75

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Solution

The fourth proportional to 81,906.67, 113,066.09 and 55,064.75 is: 76,012.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,906.67 : 113,066.09 = 55,064.75 : x
  2. Step 2: Convert to fraction form
    81,906.67/113,066.09 = 55,064.75/x
  3. Step 3: Cross multiply
    81,906.67x = 113,066.09 × 55,064.75
  4. Step 4: Simplify right side
    81,906.67x = 6,225,955,979.33
  5. Step 5: Solve for x
    x = 6,225,955,979.33/81,906.67
  6. Step 6: Final answer
    x = 76,012.81

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1.5x scale

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.