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Finding the Fourth Proportional to 69,086.81, 103,630.38 and 19,169.58

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Solution

The fourth proportional to 69,086.81, 103,630.38 and 19,169.58 is: 28,754.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,086.81 : 103,630.38 = 19,169.58 : x
  2. Step 2: Convert to fraction form
    69,086.81/103,630.38 = 19,169.58/x
  3. Step 3: Cross multiply
    69,086.81x = 103,630.38 × 19,169.58
  4. Step 4: Simplify right side
    69,086.81x = 1,986,550,859.84
  5. Step 5: Solve for x
    x = 1,986,550,859.84/69,086.81
  6. Step 6: Final answer
    x = 28,754.42

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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.