Home / 87,231.96-130,886.82-31,815

Finding the Fourth Proportional to 87,231.96, 130,886.82 and 31,815

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Solution

The fourth proportional to 87,231.96, 130,886.82 and 31,815 is: 47,736.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,231.96 : 130,886.82 = 31,815 : x
  2. Step 2: Convert to fraction form
    87,231.96/130,886.82 = 31,815/x
  3. Step 3: Cross multiply
    87,231.96x = 130,886.82 × 31,815
  4. Step 4: Simplify right side
    87,231.96x = 4,164,164,178.30
  5. Step 5: Solve for x
    x = 4,164,164,178.30/87,231.96
  6. Step 6: Final answer
    x = 47,736.68

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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.