Home / 221,290.36-331,858.78-136,921.56

Finding the Fourth Proportional to 221,290.36, 331,858.78 and 136,921.56

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Solution

The fourth proportional to 221,290.36, 331,858.78 and 136,921.56 is: 205,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,290.36 : 331,858.78 = 136,921.56 : x
  2. Step 2: Convert to fraction form
    221,290.36/331,858.78 = 136,921.56/x
  3. Step 3: Cross multiply
    221,290.36x = 331,858.78 × 136,921.56
  4. Step 4: Simplify right side
    221,290.36x = 45,438,621,857.30
  5. Step 5: Solve for x
    x = 45,438,621,857.30/221,290.36
  6. Step 6: Final answer
    x = 205,334.85

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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.