Home / 100,107.27-138,178.79-57,694.05

Finding the Fourth Proportional to 100,107.27, 138,178.79 and 57,694.05

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Solution

The fourth proportional to 100,107.27, 138,178.79 and 57,694.05 is: 79,635.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,107.27 : 138,178.79 = 57,694.05 : x
  2. Step 2: Convert to fraction form
    100,107.27/138,178.79 = 57,694.05/x
  3. Step 3: Cross multiply
    100,107.27x = 138,178.79 × 57,694.05
  4. Step 4: Simplify right side
    100,107.27x = 7,972,093,730.73
  5. Step 5: Solve for x
    x = 7,972,093,730.73/100,107.27
  6. Step 6: Final answer
    x = 79,635.51

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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.