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Finding the Fourth Proportional to 221,513.88, 332,073.22 and 81,239.96

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Solution

The fourth proportional to 221,513.88, 332,073.22 and 81,239.96 is: 121,787.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,513.88 : 332,073.22 = 81,239.96 : x
  2. Step 2: Convert to fraction form
    221,513.88/332,073.22 = 81,239.96/x
  3. Step 3: Cross multiply
    221,513.88x = 332,073.22 × 81,239.96
  4. Step 4: Simplify right side
    221,513.88x = 26,977,615,109.87
  5. Step 5: Solve for x
    x = 26,977,615,109.87/221,513.88
  6. Step 6: Final answer
    x = 121,787.47

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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.