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Finding the Fourth Proportional to 81,443.20, 122,107.20 and 37,091.20

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Solution

The fourth proportional to 81,443.20, 122,107.20 and 37,091.20 is: 55,610.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,443.20 : 122,107.20 = 37,091.20 : x
  2. Step 2: Convert to fraction form
    81,443.20/122,107.20 = 37,091.20/x
  3. Step 3: Cross multiply
    81,443.20x = 122,107.20 × 37,091.20
  4. Step 4: Simplify right side
    81,443.20x = 4,529,102,576.64
  5. Step 5: Solve for x
    x = 4,529,102,576.64/81,443.20
  6. Step 6: Final answer
    x = 55,610.57

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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.