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Finding the Fourth Proportional to 221,119.80, 331,606.80 and 80,860.20

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Solution

The fourth proportional to 221,119.80, 331,606.80 and 80,860.20 is: 121,263.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,119.80 : 331,606.80 = 80,860.20 : x
  2. Step 2: Convert to fraction form
    221,119.80/331,606.80 = 80,860.20/x
  3. Step 3: Cross multiply
    221,119.80x = 331,606.80 × 80,860.20
  4. Step 4: Simplify right side
    221,119.80x = 26,813,792,169.36
  5. Step 5: Solve for x
    x = 26,813,792,169.36/221,119.80
  6. Step 6: Final answer
    x = 121,263.64

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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.