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Finding the Fourth Proportional to 207,554.97, 311,410.83 and 81,285.36

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Solution

The fourth proportional to 207,554.97, 311,410.83 and 81,285.36 is: 121,958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,554.97 : 311,410.83 = 81,285.36 : x
  2. Step 2: Convert to fraction form
    207,554.97/311,410.83 = 81,285.36/x
  3. Step 3: Cross multiply
    207,554.97x = 311,410.83 × 81,285.36
  4. Step 4: Simplify right side
    207,554.97x = 25,313,141,424.45
  5. Step 5: Solve for x
    x = 25,313,141,424.45/207,554.97
  6. Step 6: Final answer
    x = 121,958.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.