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Finding the Fourth Proportional to 220,080.71, 330,121.19 and 120,186.29

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Solution

The fourth proportional to 220,080.71, 330,121.19 and 120,186.29 is: 180,279.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,080.71 : 330,121.19 = 120,186.29 : x
  2. Step 2: Convert to fraction form
    220,080.71/330,121.19 = 120,186.29/x
  3. Step 3: Cross multiply
    220,080.71x = 330,121.19 × 120,186.29
  4. Step 4: Simplify right side
    220,080.71x = 39,676,042,202.25
  5. Step 5: Solve for x
    x = 39,676,042,202.25/220,080.71
  6. Step 6: Final answer
    x = 180,279.51

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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.