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Finding the Fourth Proportional to 221,335.20, 332,175.60 and 103,021.20

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Solution

The fourth proportional to 221,335.20, 332,175.60 and 103,021.20 is: 154,612.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,335.20 : 332,175.60 = 103,021.20 : x
  2. Step 2: Convert to fraction form
    221,335.20/332,175.60 = 103,021.20/x
  3. Step 3: Cross multiply
    221,335.20x = 332,175.60 × 103,021.20
  4. Step 4: Simplify right side
    221,335.20x = 34,221,128,922.72
  5. Step 5: Solve for x
    x = 34,221,128,922.72/221,335.20
  6. Step 6: Final answer
    x = 154,612.23

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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.