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Finding the Fourth Proportional to 220,806.74, 331,258.98 and 80,564.96

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Solution

The fourth proportional to 220,806.74, 331,258.98 and 80,564.96 is: 120,865.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,806.74 : 331,258.98 = 80,564.96 : x
  2. Step 2: Convert to fraction form
    220,806.74/331,258.98 = 80,564.96/x
  3. Step 3: Cross multiply
    220,806.74x = 331,258.98 × 80,564.96
  4. Step 4: Simplify right side
    220,806.74x = 26,687,865,443.78
  5. Step 5: Solve for x
    x = 26,687,865,443.78/220,806.74
  6. Step 6: Final answer
    x = 120,865.27

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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.