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Finding the Fourth Proportional to 81,906.95, 113,004.31 and 66,773.51

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Solution

The fourth proportional to 81,906.95, 113,004.31 and 66,773.51 is: 92,125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,906.95 : 113,004.31 = 66,773.51 : x
  2. Step 2: Convert to fraction form
    81,906.95/113,004.31 = 66,773.51/x
  3. Step 3: Cross multiply
    81,906.95x = 113,004.31 × 66,773.51
  4. Step 4: Simplify right side
    81,906.95x = 7,545,694,372.47
  5. Step 5: Solve for x
    x = 7,545,694,372.47/81,906.95
  6. Step 6: Final answer
    x = 92,125.21

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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.