Home / 81,542.56-122,326-28,947.64

Finding the Fourth Proportional to 81,542.56, 122,326 and 28,947.64

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Solution

The fourth proportional to 81,542.56, 122,326 and 28,947.64 is: 43,425.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,542.56 : 122,326 = 28,947.64 : x
  2. Step 2: Convert to fraction form
    81,542.56/122,326 = 28,947.64/x
  3. Step 3: Cross multiply
    81,542.56x = 122,326 × 28,947.64
  4. Step 4: Simplify right side
    81,542.56x = 3,541,049,010.64
  5. Step 5: Solve for x
    x = 3,541,049,010.64/81,542.56
  6. Step 6: Final answer
    x = 43,425.78

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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.