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Finding the Fourth Proportional to 68,722.44, 103,103.64 and 28,760.28

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Solution

The fourth proportional to 68,722.44, 103,103.64 and 28,760.28 is: 43,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,722.44 : 103,103.64 = 28,760.28 : x
  2. Step 2: Convert to fraction form
    68,722.44/103,103.64 = 28,760.28/x
  3. Step 3: Cross multiply
    68,722.44x = 103,103.64 × 28,760.28
  4. Step 4: Simplify right side
    68,722.44x = 2,965,289,555.42
  5. Step 5: Solve for x
    x = 2,965,289,555.42/68,722.44
  6. Step 6: Final answer
    x = 43,148.78

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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.