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Finding the Fourth Proportional to 220,442.87, 330,811.76 and 80,201.50

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Solution

The fourth proportional to 220,442.87, 330,811.76 and 80,201.50 is: 120,355.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,442.87 : 330,811.76 = 80,201.50 : x
  2. Step 2: Convert to fraction form
    220,442.87/330,811.76 = 80,201.50/x
  3. Step 3: Cross multiply
    220,442.87x = 330,811.76 × 80,201.50
  4. Step 4: Simplify right side
    220,442.87x = 26,531,598,743.11
  5. Step 5: Solve for x
    x = 26,531,598,743.11/220,442.87
  6. Step 6: Final answer
    x = 120,355.89

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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.