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Finding the Fourth Proportional to 221,427.20, 332,086.80 and 63,639.20

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Solution

The fourth proportional to 221,427.20, 332,086.80 and 63,639.20 is: 95,443.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,427.20 : 332,086.80 = 63,639.20 : x
  2. Step 2: Convert to fraction form
    221,427.20/332,086.80 = 63,639.20/x
  3. Step 3: Cross multiply
    221,427.20x = 332,086.80 × 63,639.20
  4. Step 4: Simplify right side
    221,427.20x = 21,133,738,282.56
  5. Step 5: Solve for x
    x = 21,133,738,282.56/221,427.20
  6. Step 6: Final answer
    x = 95,443.28

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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.