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Finding the Fourth Proportional to 81,040.41, 111,731.81 and 66,450.84

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Solution

The fourth proportional to 81,040.41, 111,731.81 and 66,450.84 is: 91,616.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.41 : 111,731.81 = 66,450.84 : x
  2. Step 2: Convert to fraction form
    81,040.41/111,731.81 = 66,450.84/x
  3. Step 3: Cross multiply
    81,040.41x = 111,731.81 × 66,450.84
  4. Step 4: Simplify right side
    81,040.41x = 7,424,672,296.97
  5. Step 5: Solve for x
    x = 7,424,672,296.97/81,040.41
  6. Step 6: Final answer
    x = 91,616.91

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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.