Home / 87,820.98-131,731.80-21,261

Finding the Fourth Proportional to 87,820.98, 131,731.80 and 21,261

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Solution

The fourth proportional to 87,820.98, 131,731.80 and 21,261 is: 31,891.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,820.98 : 131,731.80 = 21,261 : x
  2. Step 2: Convert to fraction form
    87,820.98/131,731.80 = 21,261/x
  3. Step 3: Cross multiply
    87,820.98x = 131,731.80 × 21,261
  4. Step 4: Simplify right side
    87,820.98x = 2,800,749,799.80
  5. Step 5: Solve for x
    x = 2,800,749,799.80/87,820.98
  6. Step 6: Final answer
    x = 31,891.58

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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.