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Finding the Fourth Proportional to 69,089.86, 103,634.79 and 19,169.97

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Solution

The fourth proportional to 69,089.86, 103,634.79 and 19,169.97 is: 28,754.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,089.86 : 103,634.79 = 19,169.97 : x
  2. Step 2: Convert to fraction form
    69,089.86/103,634.79 = 19,169.97/x
  3. Step 3: Cross multiply
    69,089.86x = 103,634.79 × 19,169.97
  4. Step 4: Simplify right side
    69,089.86x = 1,986,675,297.08
  5. Step 5: Solve for x
    x = 1,986,675,297.08/69,089.86
  6. Step 6: Final answer
    x = 28,754.95

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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.