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Finding the Fourth Proportional to 221,063.20, 331,619.10 and 80,852.20

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Solution

The fourth proportional to 221,063.20, 331,619.10 and 80,852.20 is: 121,287.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,063.20 : 331,619.10 = 80,852.20 : x
  2. Step 2: Convert to fraction form
    221,063.20/331,619.10 = 80,852.20/x
  3. Step 3: Cross multiply
    221,063.20x = 331,619.10 × 80,852.20
  4. Step 4: Simplify right side
    221,063.20x = 26,812,133,797.02
  5. Step 5: Solve for x
    x = 26,812,133,797.02/221,063.20
  6. Step 6: Final answer
    x = 121,287.19

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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.