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Finding the Fourth Proportional to 281,195.80, 421,781.40 and 81,511.84

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Solution

The fourth proportional to 281,195.80, 421,781.40 and 81,511.84 is: 122,264.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,195.80 : 421,781.40 = 81,511.84 : x
  2. Step 2: Convert to fraction form
    281,195.80/421,781.40 = 81,511.84/x
  3. Step 3: Cross multiply
    281,195.80x = 421,781.40 × 81,511.84
  4. Step 4: Simplify right side
    281,195.80x = 34,380,177,991.78
  5. Step 5: Solve for x
    x = 34,380,177,991.78/281,195.80
  6. Step 6: Final answer
    x = 122,264.19

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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.