Home / 220,981.60-331,520.40-80,740

Finding the Fourth Proportional to 220,981.60, 331,520.40 and 80,740

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Solution

The fourth proportional to 220,981.60, 331,520.40 and 80,740 is: 121,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,981.60 : 331,520.40 = 80,740 : x
  2. Step 2: Convert to fraction form
    220,981.60/331,520.40 = 80,740/x
  3. Step 3: Cross multiply
    220,981.60x = 331,520.40 × 80,740
  4. Step 4: Simplify right side
    220,981.60x = 26,766,957,096
  5. Step 5: Solve for x
    x = 26,766,957,096/220,981.60
  6. Step 6: Final answer
    x = 121,127.54

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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.