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Finding the Fourth Proportional to 221,100.80, 331,570.20 and 71,380.40

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Solution

The fourth proportional to 221,100.80, 331,570.20 and 71,380.40 is: 107,044.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,100.80 : 331,570.20 = 71,380.40 : x
  2. Step 2: Convert to fraction form
    221,100.80/331,570.20 = 71,380.40/x
  3. Step 3: Cross multiply
    221,100.80x = 331,570.20 × 71,380.40
  4. Step 4: Simplify right side
    221,100.80x = 23,667,613,504.08
  5. Step 5: Solve for x
    x = 23,667,613,504.08/221,100.80
  6. Step 6: Final answer
    x = 107,044.45

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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.