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Finding the Fourth Proportional to 221,599.80, 332,312.22 and 81,281.88

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Solution

The fourth proportional to 221,599.80, 332,312.22 and 81,281.88 is: 121,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,599.80 : 332,312.22 = 81,281.88 : x
  2. Step 2: Convert to fraction form
    221,599.80/332,312.22 = 81,281.88/x
  3. Step 3: Cross multiply
    221,599.80x = 332,312.22 × 81,281.88
  4. Step 4: Simplify right side
    221,599.80x = 27,010,961,988.57
  5. Step 5: Solve for x
    x = 27,010,961,988.57/221,599.80
  6. Step 6: Final answer
    x = 121,890.73

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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.