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Finding the Fourth Proportional to 221,556.60, 332,334.90 and 81,369.90

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Solution

The fourth proportional to 221,556.60, 332,334.90 and 81,369.90 is: 122,054.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,556.60 : 332,334.90 = 81,369.90 : x
  2. Step 2: Convert to fraction form
    221,556.60/332,334.90 = 81,369.90/x
  3. Step 3: Cross multiply
    221,556.60x = 332,334.90 × 81,369.90
  4. Step 4: Simplify right side
    221,556.60x = 27,042,057,579.51
  5. Step 5: Solve for x
    x = 27,042,057,579.51/221,556.60
  6. Step 6: Final answer
    x = 122,054.85

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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.