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Finding the Fourth Proportional to 221,859.40, 332,920.86 and 81,716.36

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Solution

The fourth proportional to 221,859.40, 332,920.86 and 81,716.36 is: 122,623.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,859.40 : 332,920.86 = 81,716.36 : x
  2. Step 2: Convert to fraction form
    221,859.40/332,920.86 = 81,716.36/x
  3. Step 3: Cross multiply
    221,859.40x = 332,920.86 × 81,716.36
  4. Step 4: Simplify right side
    221,859.40x = 27,205,080,847.27
  5. Step 5: Solve for x
    x = 27,205,080,847.27/221,859.40
  6. Step 6: Final answer
    x = 122,623.07

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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.