Home / 138,481.09-207,721.62-79,275.04

Finding the Fourth Proportional to 138,481.09, 207,721.62 and 79,275.04

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Solution

The fourth proportional to 138,481.09, 207,721.62 and 79,275.04 is: 118,912.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,481.09 : 207,721.62 = 79,275.04 : x
  2. Step 2: Convert to fraction form
    138,481.09/207,721.62 = 79,275.04/x
  3. Step 3: Cross multiply
    138,481.09x = 207,721.62 × 79,275.04
  4. Step 4: Simplify right side
    138,481.09x = 16,467,139,734.36
  5. Step 5: Solve for x
    x = 16,467,139,734.36/138,481.09
  6. Step 6: Final answer
    x = 118,912.55

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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.