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Finding the Fourth Proportional to 87,958.40, 131,851.20 and 78,627.20

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Solution

The fourth proportional to 87,958.40, 131,851.20 and 78,627.20 is: 117,863.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,958.40 : 131,851.20 = 78,627.20 : x
  2. Step 2: Convert to fraction form
    87,958.40/131,851.20 = 78,627.20/x
  3. Step 3: Cross multiply
    87,958.40x = 131,851.20 × 78,627.20
  4. Step 4: Simplify right side
    87,958.40x = 10,367,090,672.64
  5. Step 5: Solve for x
    x = 10,367,090,672.64/87,958.40
  6. Step 6: Final answer
    x = 117,863.57

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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.