Home / 90,719.36-135,882.12-43,874

Finding the Fourth Proportional to 90,719.36, 135,882.12 and 43,874

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Solution

The fourth proportional to 90,719.36, 135,882.12 and 43,874 is: 65,715.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,719.36 : 135,882.12 = 43,874 : x
  2. Step 2: Convert to fraction form
    90,719.36/135,882.12 = 43,874/x
  3. Step 3: Cross multiply
    90,719.36x = 135,882.12 × 43,874
  4. Step 4: Simplify right side
    90,719.36x = 5,961,692,132.88
  5. Step 5: Solve for x
    x = 5,961,692,132.88/90,719.36
  6. Step 6: Final answer
    x = 65,715.76

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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.