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Finding the Fourth Proportional to 220,109.84, 330,295.92 and 79,879.40

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Solution

The fourth proportional to 220,109.84, 330,295.92 and 79,879.40 is: 119,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,109.84 : 330,295.92 = 79,879.40 : x
  2. Step 2: Convert to fraction form
    220,109.84/330,295.92 = 79,879.40/x
  3. Step 3: Cross multiply
    220,109.84x = 330,295.92 × 79,879.40
  4. Step 4: Simplify right side
    220,109.84x = 26,383,839,912.05
  5. Step 5: Solve for x
    x = 26,383,839,912.05/220,109.84
  6. Step 6: Final answer
    x = 119,866.70

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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.