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Finding the Fourth Proportional to 220,206.80, 330,439.80 and 79,979.60

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Solution

The fourth proportional to 220,206.80, 330,439.80 and 79,979.60 is: 120,016.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,206.80 : 330,439.80 = 79,979.60 : x
  2. Step 2: Convert to fraction form
    220,206.80/330,439.80 = 79,979.60/x
  3. Step 3: Cross multiply
    220,206.80x = 330,439.80 × 79,979.60
  4. Step 4: Simplify right side
    220,206.80x = 26,428,443,028.08
  5. Step 5: Solve for x
    x = 26,428,443,028.08/220,206.80
  6. Step 6: Final answer
    x = 120,016.47

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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.