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Finding the Fourth Proportional to 221,556.54, 305,746.46 and 120,954.54

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Solution

The fourth proportional to 221,556.54, 305,746.46 and 120,954.54 is: 166,916.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,556.54 : 305,746.46 = 120,954.54 : x
  2. Step 2: Convert to fraction form
    221,556.54/305,746.46 = 120,954.54/x
  3. Step 3: Cross multiply
    221,556.54x = 305,746.46 × 120,954.54
  4. Step 4: Simplify right side
    221,556.54x = 36,981,422,425.93
  5. Step 5: Solve for x
    x = 36,981,422,425.93/221,556.54
  6. Step 6: Final answer
    x = 166,916.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.