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Finding the Fourth Proportional to 69,076.92, 103,615.40 and 19,169.60

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Solution

The fourth proportional to 69,076.92, 103,615.40 and 19,169.60 is: 28,754.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,076.92 : 103,615.40 = 19,169.60 : x
  2. Step 2: Convert to fraction form
    69,076.92/103,615.40 = 19,169.60/x
  3. Step 3: Cross multiply
    69,076.92x = 103,615.40 × 19,169.60
  4. Step 4: Simplify right side
    69,076.92x = 1,986,265,771.84
  5. Step 5: Solve for x
    x = 1,986,265,771.84/69,076.92
  6. Step 6: Final answer
    x = 28,754.41

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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.