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Finding the Fourth Proportional to 221,675.20, 332,561.40 and 109,409.20

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Solution

The fourth proportional to 221,675.20, 332,561.40 and 109,409.20 is: 164,137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,675.20 : 332,561.40 = 109,409.20 : x
  2. Step 2: Convert to fraction form
    221,675.20/332,561.40 = 109,409.20/x
  3. Step 3: Cross multiply
    221,675.20x = 332,561.40 × 109,409.20
  4. Step 4: Simplify right side
    221,675.20x = 36,385,276,724.88
  5. Step 5: Solve for x
    x = 36,385,276,724.88/221,675.20
  6. Step 6: Final answer
    x = 164,137.79

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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.