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Finding the Fourth Proportional to 100,172.80, 150,203.04 and 68,618.49

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Solution

The fourth proportional to 100,172.80, 150,203.04 and 68,618.49 is: 102,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,172.80 : 150,203.04 = 68,618.49 : x
  2. Step 2: Convert to fraction form
    100,172.80/150,203.04 = 68,618.49/x
  3. Step 3: Cross multiply
    100,172.80x = 150,203.04 × 68,618.49
  4. Step 4: Simplify right side
    100,172.80x = 10,306,705,798.21
  5. Step 5: Solve for x
    x = 10,306,705,798.21/100,172.80
  6. Step 6: Final answer
    x = 102,889.27

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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.