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Finding the Fourth Proportional to 220,830.20, 331,269.60 and 80,619.20

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Solution

The fourth proportional to 220,830.20, 331,269.60 and 80,619.20 is: 120,937.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,830.20 : 331,269.60 = 80,619.20 : x
  2. Step 2: Convert to fraction form
    220,830.20/331,269.60 = 80,619.20/x
  3. Step 3: Cross multiply
    220,830.20x = 331,269.60 × 80,619.20
  4. Step 4: Simplify right side
    220,830.20x = 26,706,690,136.32
  5. Step 5: Solve for x
    x = 26,706,690,136.32/220,830.20
  6. Step 6: Final answer
    x = 120,937.67

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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.