Home / 86,979.74-119,132.66-81,873.09

Finding the Fourth Proportional to 86,979.74, 119,132.66 and 81,873.09

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Solution

The fourth proportional to 86,979.74, 119,132.66 and 81,873.09 is: 112,138.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.74 : 119,132.66 = 81,873.09 : x
  2. Step 2: Convert to fraction form
    86,979.74/119,132.66 = 81,873.09/x
  3. Step 3: Cross multiply
    86,979.74x = 119,132.66 × 81,873.09
  4. Step 4: Simplify right side
    86,979.74x = 9,753,759,198.80
  5. Step 5: Solve for x
    x = 9,753,759,198.80/86,979.74
  6. Step 6: Final answer
    x = 112,138.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.