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Finding the Fourth Proportional to 87,912.84, 131,885.46 and 28,751.79

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Solution

The fourth proportional to 87,912.84, 131,885.46 and 28,751.79 is: 43,132.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,912.84 : 131,885.46 = 28,751.79 : x
  2. Step 2: Convert to fraction form
    87,912.84/131,885.46 = 28,751.79/x
  3. Step 3: Cross multiply
    87,912.84x = 131,885.46 × 28,751.79
  4. Step 4: Simplify right side
    87,912.84x = 3,791,943,049.97
  5. Step 5: Solve for x
    x = 3,791,943,049.97/87,912.84
  6. Step 6: Final answer
    x = 43,132.98

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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.