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Finding the Fourth Proportional to 221,103.89, 331,720.90 and 71,341.37

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Solution

The fourth proportional to 221,103.89, 331,720.90 and 71,341.37 is: 107,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,103.89 : 331,720.90 = 71,341.37 : x
  2. Step 2: Convert to fraction form
    221,103.89/331,720.90 = 71,341.37/x
  3. Step 3: Cross multiply
    221,103.89x = 331,720.90 × 71,341.37
  4. Step 4: Simplify right side
    221,103.89x = 23,665,422,812.68
  5. Step 5: Solve for x
    x = 23,665,422,812.68/221,103.89
  6. Step 6: Final answer
    x = 107,033.05

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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.