Home / 81,324.54-121,979.61-28,731.42

Finding the Fourth Proportional to 81,324.54, 121,979.61 and 28,731.42

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Solution

The fourth proportional to 81,324.54, 121,979.61 and 28,731.42 is: 43,094.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,324.54 : 121,979.61 = 28,731.42 : x
  2. Step 2: Convert to fraction form
    81,324.54/121,979.61 = 28,731.42/x
  3. Step 3: Cross multiply
    81,324.54x = 121,979.61 × 28,731.42
  4. Step 4: Simplify right side
    81,324.54x = 3,504,647,406.35
  5. Step 5: Solve for x
    x = 3,504,647,406.35/81,324.54
  6. Step 6: Final answer
    x = 43,094.59

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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.