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Finding the Fourth Proportional to 118,049.80, 176,783.10 and 87,991.96

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Solution

The fourth proportional to 118,049.80, 176,783.10 and 87,991.96 is: 131,770.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,049.80 : 176,783.10 = 87,991.96 : x
  2. Step 2: Convert to fraction form
    118,049.80/176,783.10 = 87,991.96/x
  3. Step 3: Cross multiply
    118,049.80x = 176,783.10 × 87,991.96
  4. Step 4: Simplify right side
    118,049.80x = 15,555,491,463.88
  5. Step 5: Solve for x
    x = 15,555,491,463.88/118,049.80
  6. Step 6: Final answer
    x = 131,770.59

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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.