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Finding the Fourth Proportional to 217,991.40, 300,793.14 and 122,497.80

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Solution

The fourth proportional to 217,991.40, 300,793.14 and 122,497.80 is: 169,027.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,991.40 : 300,793.14 = 122,497.80 : x
  2. Step 2: Convert to fraction form
    217,991.40/300,793.14 = 122,497.80/x
  3. Step 3: Cross multiply
    217,991.40x = 300,793.14 × 122,497.80
  4. Step 4: Simplify right side
    217,991.40x = 36,846,497,905.09
  5. Step 5: Solve for x
    x = 36,846,497,905.09/217,991.40
  6. Step 6: Final answer
    x = 169,027.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.