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Finding the Fourth Proportional to 220,258.80, 330,474.60 and 80,031.60

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Solution

The fourth proportional to 220,258.80, 330,474.60 and 80,031.60 is: 120,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,258.80 : 330,474.60 = 80,031.60 : x
  2. Step 2: Convert to fraction form
    220,258.80/330,474.60 = 80,031.60/x
  3. Step 3: Cross multiply
    220,258.80x = 330,474.60 × 80,031.60
  4. Step 4: Simplify right side
    220,258.80x = 26,448,410,997.36
  5. Step 5: Solve for x
    x = 26,448,410,997.36/220,258.80
  6. Step 6: Final answer
    x = 120,078.79

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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.