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Finding the Fourth Proportional to 81,741, 121,896.18 and 80,993.62

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Solution

The fourth proportional to 81,741, 121,896.18 and 80,993.62 is: 120,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,741 : 121,896.18 = 80,993.62 : x
  2. Step 2: Convert to fraction form
    81,741/121,896.18 = 80,993.62/x
  3. Step 3: Cross multiply
    81,741x = 121,896.18 × 80,993.62
  4. Step 4: Simplify right side
    81,741x = 9,872,812,882.37
  5. Step 5: Solve for x
    x = 9,872,812,882.37/81,741
  6. Step 6: Final answer
    x = 120,781.65

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.