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Finding the Fourth Proportional to 221,341.29, 331,814.70 and 81,067.11

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Solution

The fourth proportional to 221,341.29, 331,814.70 and 81,067.11 is: 121,528.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,341.29 : 331,814.70 = 81,067.11 : x
  2. Step 2: Convert to fraction form
    221,341.29/331,814.70 = 81,067.11/x
  3. Step 3: Cross multiply
    221,341.29x = 331,814.70 × 81,067.11
  4. Step 4: Simplify right side
    221,341.29x = 26,899,258,784.52
  5. Step 5: Solve for x
    x = 26,899,258,784.52/221,341.29
  6. Step 6: Final answer
    x = 121,528.43

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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.