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Finding the Fourth Proportional to 221,646.45, 332,469.68 and 81,386.85

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Solution

The fourth proportional to 221,646.45, 332,469.68 and 81,386.85 is: 122,080.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,646.45 : 332,469.68 = 81,386.85 : x
  2. Step 2: Convert to fraction form
    221,646.45/332,469.68 = 81,386.85/x
  3. Step 3: Cross multiply
    221,646.45x = 332,469.68 × 81,386.85
  4. Step 4: Simplify right side
    221,646.45x = 27,058,659,568.77
  5. Step 5: Solve for x
    x = 27,058,659,568.77/221,646.45
  6. Step 6: Final answer
    x = 122,080.28

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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.