Home / 135,868.11-203,694.97-85,842.78

Finding the Fourth Proportional to 135,868.11, 203,694.97 and 85,842.78

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Solution

The fourth proportional to 135,868.11, 203,694.97 and 85,842.78 is: 128,696.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,868.11 : 203,694.97 = 85,842.78 : x
  2. Step 2: Convert to fraction form
    135,868.11/203,694.97 = 85,842.78/x
  3. Step 3: Cross multiply
    135,868.11x = 203,694.97 × 85,842.78
  4. Step 4: Simplify right side
    135,868.11x = 17,485,742,496.82
  5. Step 5: Solve for x
    x = 17,485,742,496.82/135,868.11
  6. Step 6: Final answer
    x = 128,696.44

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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.