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Finding the Fourth Proportional to 281,108.80, 421,663.20 and 163,083.70

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Solution

The fourth proportional to 281,108.80, 421,663.20 and 163,083.70 is: 244,625.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,108.80 : 421,663.20 = 163,083.70 : x
  2. Step 2: Convert to fraction form
    281,108.80/421,663.20 = 163,083.70/x
  3. Step 3: Cross multiply
    281,108.80x = 421,663.20 × 163,083.70
  4. Step 4: Simplify right side
    281,108.80x = 68,766,394,809.84
  5. Step 5: Solve for x
    x = 68,766,394,809.84/281,108.80
  6. Step 6: Final answer
    x = 244,625.55

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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.