Home / 138,357.18-207,273.26-82,078.38

Finding the Fourth Proportional to 138,357.18, 207,273.26 and 82,078.38

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Solution

The fourth proportional to 138,357.18, 207,273.26 and 82,078.38 is: 122,961.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,357.18 : 207,273.26 = 82,078.38 : x
  2. Step 2: Convert to fraction form
    138,357.18/207,273.26 = 82,078.38/x
  3. Step 3: Cross multiply
    138,357.18x = 207,273.26 × 82,078.38
  4. Step 4: Simplify right side
    138,357.18x = 17,012,653,398.12
  5. Step 5: Solve for x
    x = 17,012,653,398.12/138,357.18
  6. Step 6: Final answer
    x = 122,961.84

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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.