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Finding the Fourth Proportional to 220,123.14, 330,235.14 and 79,881.78

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Solution

The fourth proportional to 220,123.14, 330,235.14 and 79,881.78 is: 119,840.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,123.14 : 330,235.14 = 79,881.78 : x
  2. Step 2: Convert to fraction form
    220,123.14/330,235.14 = 79,881.78/x
  3. Step 3: Cross multiply
    220,123.14x = 330,235.14 × 79,881.78
  4. Step 4: Simplify right side
    220,123.14x = 26,379,770,801.75
  5. Step 5: Solve for x
    x = 26,379,770,801.75/220,123.14
  6. Step 6: Final answer
    x = 119,840.97

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1.5x scale

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.