Home / 138,034.62-190,474.61-80,687.36

Finding the Fourth Proportional to 138,034.62, 190,474.61 and 80,687.36

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Solution

The fourth proportional to 138,034.62, 190,474.61 and 80,687.36 is: 111,340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,034.62 : 190,474.61 = 80,687.36 : x
  2. Step 2: Convert to fraction form
    138,034.62/190,474.61 = 80,687.36/x
  3. Step 3: Cross multiply
    138,034.62x = 190,474.61 × 80,687.36
  4. Step 4: Simplify right side
    138,034.62x = 15,368,893,500.68
  5. Step 5: Solve for x
    x = 15,368,893,500.68/138,034.62
  6. Step 6: Final answer
    x = 111,340.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.