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Finding the Fourth Proportional to 87,770.56, 131,630.70 and 28,611.40

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Solution

The fourth proportional to 87,770.56, 131,630.70 and 28,611.40 is: 42,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,770.56 : 131,630.70 = 28,611.40 : x
  2. Step 2: Convert to fraction form
    87,770.56/131,630.70 = 28,611.40/x
  3. Step 3: Cross multiply
    87,770.56x = 131,630.70 × 28,611.40
  4. Step 4: Simplify right side
    87,770.56x = 3,766,138,609.98
  5. Step 5: Solve for x
    x = 3,766,138,609.98/87,770.56
  6. Step 6: Final answer
    x = 42,908.90

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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.