Home / 55,181.88-82,785.16-20,121.54

Finding the Fourth Proportional to 55,181.88, 82,785.16 and 20,121.54

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Solution

The fourth proportional to 55,181.88, 82,785.16 and 20,121.54 is: 30,186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,181.88 : 82,785.16 = 20,121.54 : x
  2. Step 2: Convert to fraction form
    55,181.88/82,785.16 = 20,121.54/x
  3. Step 3: Cross multiply
    55,181.88x = 82,785.16 × 20,121.54
  4. Step 4: Simplify right side
    55,181.88x = 1,665,764,912.48
  5. Step 5: Solve for x
    x = 1,665,764,912.48/55,181.88
  6. Step 6: Final answer
    x = 30,186.81

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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.