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Finding the Fourth Proportional to 87,980.91, 131,958 and 28,815.27

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Solution

The fourth proportional to 87,980.91, 131,958 and 28,815.27 is: 43,218.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.91 : 131,958 = 28,815.27 : x
  2. Step 2: Convert to fraction form
    87,980.91/131,958 = 28,815.27/x
  3. Step 3: Cross multiply
    87,980.91x = 131,958 × 28,815.27
  4. Step 4: Simplify right side
    87,980.91x = 3,802,405,398.66
  5. Step 5: Solve for x
    x = 3,802,405,398.66/87,980.91
  6. Step 6: Final answer
    x = 43,218.53

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1.5x scale

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.