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Finding the Fourth Proportional to 100,397.56, 150,397.08 and 68,729.80

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Solution

The fourth proportional to 100,397.56, 150,397.08 and 68,729.80 is: 102,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,397.56 : 150,397.08 = 68,729.80 : x
  2. Step 2: Convert to fraction form
    100,397.56/150,397.08 = 68,729.80/x
  3. Step 3: Cross multiply
    100,397.56x = 150,397.08 × 68,729.80
  4. Step 4: Simplify right side
    100,397.56x = 10,336,761,228.98
  5. Step 5: Solve for x
    x = 10,336,761,228.98/100,397.56
  6. Step 6: Final answer
    x = 102,958.29

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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.