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Finding the Fourth Proportional to 221,365.29, 331,850.70 and 81,091.11

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Solution

The fourth proportional to 221,365.29, 331,850.70 and 81,091.11 is: 121,564.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,365.29 : 331,850.70 = 81,091.11 : x
  2. Step 2: Convert to fraction form
    221,365.29/331,850.70 = 81,091.11/x
  3. Step 3: Cross multiply
    221,365.29x = 331,850.70 × 81,091.11
  4. Step 4: Simplify right side
    221,365.29x = 26,910,141,617.28
  5. Step 5: Solve for x
    x = 26,910,141,617.28/221,365.29
  6. Step 6: Final answer
    x = 121,564.41

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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.