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Finding the Fourth Proportional to 220,121.20, 330,181.80 and 53,909.20

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Solution

The fourth proportional to 220,121.20, 330,181.80 and 53,909.20 is: 80,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,121.20 : 330,181.80 = 53,909.20 : x
  2. Step 2: Convert to fraction form
    220,121.20/330,181.80 = 53,909.20/x
  3. Step 3: Cross multiply
    220,121.20x = 330,181.80 × 53,909.20
  4. Step 4: Simplify right side
    220,121.20x = 17,799,836,692.56
  5. Step 5: Solve for x
    x = 17,799,836,692.56/220,121.20
  6. Step 6: Final answer
    x = 80,863.80

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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.