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Finding the Fourth Proportional to 220,935.20, 331,451.40 and 71,182.40

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Solution

The fourth proportional to 220,935.20, 331,451.40 and 71,182.40 is: 106,789.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,935.20 : 331,451.40 = 71,182.40 : x
  2. Step 2: Convert to fraction form
    220,935.20/331,451.40 = 71,182.40/x
  3. Step 3: Cross multiply
    220,935.20x = 331,451.40 × 71,182.40
  4. Step 4: Simplify right side
    220,935.20x = 23,593,506,135.36
  5. Step 5: Solve for x
    x = 23,593,506,135.36/220,935.20
  6. Step 6: Final answer
    x = 106,789.26

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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.