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Finding the Fourth Proportional to 87,775.40, 131,683.90 and 28,611.40

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Solution

The fourth proportional to 87,775.40, 131,683.90 and 28,611.40 is: 42,923.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,775.40 : 131,683.90 = 28,611.40 : x
  2. Step 2: Convert to fraction form
    87,775.40/131,683.90 = 28,611.40/x
  3. Step 3: Cross multiply
    87,775.40x = 131,683.90 × 28,611.40
  4. Step 4: Simplify right side
    87,775.40x = 3,767,660,736.46
  5. Step 5: Solve for x
    x = 3,767,660,736.46/87,775.40
  6. Step 6: Final answer
    x = 42,923.88

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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.