Home / 81,399.36-122,118-25,236.54

Finding the Fourth Proportional to 81,399.36, 122,118 and 25,236.54

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Solution

The fourth proportional to 81,399.36, 122,118 and 25,236.54 is: 37,860.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,399.36 : 122,118 = 25,236.54 : x
  2. Step 2: Convert to fraction form
    81,399.36/122,118 = 25,236.54/x
  3. Step 3: Cross multiply
    81,399.36x = 122,118 × 25,236.54
  4. Step 4: Simplify right side
    81,399.36x = 3,081,835,791.72
  5. Step 5: Solve for x
    x = 3,081,835,791.72/81,399.36
  6. Step 6: Final answer
    x = 37,860.69

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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.