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Finding the Fourth Proportional to 225,383.31, 311,028.26 and 124,781.31

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Solution

The fourth proportional to 225,383.31, 311,028.26 and 124,781.31 is: 172,197.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,383.31 : 311,028.26 = 124,781.31 : x
  2. Step 2: Convert to fraction form
    225,383.31/311,028.26 = 124,781.31/x
  3. Step 3: Cross multiply
    225,383.31x = 311,028.26 × 124,781.31
  4. Step 4: Simplify right side
    225,383.31x = 38,810,513,105.91
  5. Step 5: Solve for x
    x = 38,810,513,105.91/225,383.31
  6. Step 6: Final answer
    x = 172,197.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.