Home / 87,982.10-131,985.30-31,808.60

Finding the Fourth Proportional to 87,982.10, 131,985.30 and 31,808.60

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Solution

The fourth proportional to 87,982.10, 131,985.30 and 31,808.60 is: 47,717.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,982.10 : 131,985.30 = 31,808.60 : x
  2. Step 2: Convert to fraction form
    87,982.10/131,985.30 = 31,808.60/x
  3. Step 3: Cross multiply
    87,982.10x = 131,985.30 × 31,808.60
  4. Step 4: Simplify right side
    87,982.10x = 4,198,267,613.58
  5. Step 5: Solve for x
    x = 4,198,267,613.58/87,982.10
  6. Step 6: Final answer
    x = 47,717.29

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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.