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Finding the Fourth Proportional to 220,809.70, 331,323.90 and 126,112.60

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Solution

The fourth proportional to 220,809.70, 331,323.90 and 126,112.60 is: 189,231.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,809.70 : 331,323.90 = 126,112.60 : x
  2. Step 2: Convert to fraction form
    220,809.70/331,323.90 = 126,112.60/x
  3. Step 3: Cross multiply
    220,809.70x = 331,323.90 × 126,112.60
  4. Step 4: Simplify right side
    220,809.70x = 41,784,118,471.14
  5. Step 5: Solve for x
    x = 41,784,118,471.14/220,809.70
  6. Step 6: Final answer
    x = 189,231.35

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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.