Home / 138,356.28-190,945.24-80,992.14

Finding the Fourth Proportional to 138,356.28, 190,945.24 and 80,992.14

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Solution

The fourth proportional to 138,356.28, 190,945.24 and 80,992.14 is: 111,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,356.28 : 190,945.24 = 80,992.14 : x
  2. Step 2: Convert to fraction form
    138,356.28/190,945.24 = 80,992.14/x
  3. Step 3: Cross multiply
    138,356.28x = 190,945.24 × 80,992.14
  4. Step 4: Simplify right side
    138,356.28x = 15,465,063,610.41
  5. Step 5: Solve for x
    x = 15,465,063,610.41/138,356.28
  6. Step 6: Final answer
    x = 111,777.10

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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.