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Finding the Fourth Proportional to 399,617.21, 599,411.99 and 100,100.37

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Solution

The fourth proportional to 399,617.21, 599,411.99 and 100,100.37 is: 150,147.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,617.21 : 599,411.99 = 100,100.37 : x
  2. Step 2: Convert to fraction form
    399,617.21/599,411.99 = 100,100.37/x
  3. Step 3: Cross multiply
    399,617.21x = 599,411.99 × 100,100.37
  4. Step 4: Simplify right side
    399,617.21x = 60,001,361,981.44
  5. Step 5: Solve for x
    x = 60,001,361,981.44/399,617.21
  6. Step 6: Final answer
    x = 150,147.09

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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.