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Finding the Fourth Proportional to 142,363.80, 196,481.70 and 81,933.30

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Solution

The fourth proportional to 142,363.80, 196,481.70 and 81,933.30 is: 113,079.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,363.80 : 196,481.70 = 81,933.30 : x
  2. Step 2: Convert to fraction form
    142,363.80/196,481.70 = 81,933.30/x
  3. Step 3: Cross multiply
    142,363.80x = 196,481.70 × 81,933.30
  4. Step 4: Simplify right side
    142,363.80x = 16,098,394,070.61
  5. Step 5: Solve for x
    x = 16,098,394,070.61/142,363.80
  6. Step 6: Final answer
    x = 113,079.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.