Home / 221,357.54-331,839.06-81,083.36

Finding the Fourth Proportional to 221,357.54, 331,839.06 and 81,083.36

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Solution

The fourth proportional to 221,357.54, 331,839.06 and 81,083.36 is: 121,552.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,357.54 : 331,839.06 = 81,083.36 : x
  2. Step 2: Convert to fraction form
    221,357.54/331,839.06 = 81,083.36/x
  3. Step 3: Cross multiply
    221,357.54x = 331,839.06 × 81,083.36
  4. Step 4: Simplify right side
    221,357.54x = 26,906,625,964.04
  5. Step 5: Solve for x
    x = 26,906,625,964.04/221,357.54
  6. Step 6: Final answer
    x = 121,552.79

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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.