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Finding the Fourth Proportional to 139,399.20, 209,098.80 and 100,324.80

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Solution

The fourth proportional to 139,399.20, 209,098.80 and 100,324.80 is: 150,487.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,399.20 : 209,098.80 = 100,324.80 : x
  2. Step 2: Convert to fraction form
    139,399.20/209,098.80 = 100,324.80/x
  3. Step 3: Cross multiply
    139,399.20x = 209,098.80 × 100,324.80
  4. Step 4: Simplify right side
    139,399.20x = 20,977,795,290.24
  5. Step 5: Solve for x
    x = 20,977,795,290.24/139,399.20
  6. Step 6: Final answer
    x = 150,487.20

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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.