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Finding the Fourth Proportional to 220,405.80, 330,738.30 and 80,146.20

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Solution

The fourth proportional to 220,405.80, 330,738.30 and 80,146.20 is: 120,266.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,405.80 : 330,738.30 = 80,146.20 : x
  2. Step 2: Convert to fraction form
    220,405.80/330,738.30 = 80,146.20/x
  3. Step 3: Cross multiply
    220,405.80x = 330,738.30 × 80,146.20
  4. Step 4: Simplify right side
    220,405.80x = 26,507,417,939.46
  5. Step 5: Solve for x
    x = 26,507,417,939.46/220,405.80
  6. Step 6: Final answer
    x = 120,266.43

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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.