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Finding the Fourth Proportional to 69,784.74, 104,661.39 and 19,863.73

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Solution

The fourth proportional to 69,784.74, 104,661.39 and 19,863.73 is: 29,791.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,784.74 : 104,661.39 = 19,863.73 : x
  2. Step 2: Convert to fraction form
    69,784.74/104,661.39 = 19,863.73/x
  3. Step 3: Cross multiply
    69,784.74x = 104,661.39 × 19,863.73
  4. Step 4: Simplify right side
    69,784.74x = 2,078,965,493.07
  5. Step 5: Solve for x
    x = 2,078,965,493.07/69,784.74
  6. Step 6: Final answer
    x = 29,791.12

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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.