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Finding the Fourth Proportional to 220,139.20, 330,208.80 and 79,879.60

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Solution

The fourth proportional to 220,139.20, 330,208.80 and 79,879.60 is: 119,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,139.20 : 330,208.80 = 79,879.60 : x
  2. Step 2: Convert to fraction form
    220,139.20/330,208.80 = 79,879.60/x
  3. Step 3: Cross multiply
    220,139.20x = 330,208.80 × 79,879.60
  4. Step 4: Simplify right side
    220,139.20x = 26,376,946,860.48
  5. Step 5: Solve for x
    x = 26,376,946,860.48/220,139.20
  6. Step 6: Final answer
    x = 119,819.40

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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.