Home / 138,121.31-207,181.96-91,363.25

Finding the Fourth Proportional to 138,121.31, 207,181.96 and 91,363.25

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Solution

The fourth proportional to 138,121.31, 207,181.96 and 91,363.25 is: 137,044.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,121.31 : 207,181.96 = 91,363.25 : x
  2. Step 2: Convert to fraction form
    138,121.31/207,181.96 = 91,363.25/x
  3. Step 3: Cross multiply
    138,121.31x = 207,181.96 × 91,363.25
  4. Step 4: Simplify right side
    138,121.31x = 18,928,816,285.26
  5. Step 5: Solve for x
    x = 18,928,816,285.26/138,121.31
  6. Step 6: Final answer
    x = 137,044.87

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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.