Home / 81,440.20-122,127.90-28,822.60

Finding the Fourth Proportional to 81,440.20, 122,127.90 and 28,822.60

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Solution

The fourth proportional to 81,440.20, 122,127.90 and 28,822.60 is: 43,222.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,440.20 : 122,127.90 = 28,822.60 : x
  2. Step 2: Convert to fraction form
    81,440.20/122,127.90 = 28,822.60/x
  3. Step 3: Cross multiply
    81,440.20x = 122,127.90 × 28,822.60
  4. Step 4: Simplify right side
    81,440.20x = 3,520,043,610.54
  5. Step 5: Solve for x
    x = 3,520,043,610.54/81,440.20
  6. Step 6: Final answer
    x = 43,222.43

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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.