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Finding the Fourth Proportional to 220,997.20, 331,495.80 and 80,737.60

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Solution

The fourth proportional to 220,997.20, 331,495.80 and 80,737.60 is: 121,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,997.20 : 331,495.80 = 80,737.60 : x
  2. Step 2: Convert to fraction form
    220,997.20/331,495.80 = 80,737.60/x
  3. Step 3: Cross multiply
    220,997.20x = 331,495.80 × 80,737.60
  4. Step 4: Simplify right side
    220,997.20x = 26,764,175,302.08
  5. Step 5: Solve for x
    x = 26,764,175,302.08/220,997.20
  6. Step 6: Final answer
    x = 121,106.40

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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.