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Finding the Fourth Proportional to 100,614.97, 150,709.21 and 68,876.13

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Solution

The fourth proportional to 100,614.97, 150,709.21 and 68,876.13 is: 103,168.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,614.97 : 150,709.21 = 68,876.13 : x
  2. Step 2: Convert to fraction form
    100,614.97/150,709.21 = 68,876.13/x
  3. Step 3: Cross multiply
    100,614.97x = 150,709.21 × 68,876.13
  4. Step 4: Simplify right side
    100,614.97x = 10,380,266,967.97
  5. Step 5: Solve for x
    x = 10,380,266,967.97/100,614.97
  6. Step 6: Final answer
    x = 103,168.22

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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.