Home / 221,111.78-331,723.55-87,991.52

Finding the Fourth Proportional to 221,111.78, 331,723.55 and 87,991.52

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Solution

The fourth proportional to 221,111.78, 331,723.55 and 87,991.52 is: 132,009.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,111.78 : 331,723.55 = 87,991.52 : x
  2. Step 2: Convert to fraction form
    221,111.78/331,723.55 = 87,991.52/x
  3. Step 3: Cross multiply
    221,111.78x = 331,723.55 × 87,991.52
  4. Step 4: Simplify right side
    221,111.78x = 29,188,857,945.66
  5. Step 5: Solve for x
    x = 29,188,857,945.66/221,111.78
  6. Step 6: Final answer
    x = 132,009.51

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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.