Home / 87,981.29-131,958.56-28,815.65

Finding the Fourth Proportional to 87,981.29, 131,958.56 and 28,815.65

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Solution

The fourth proportional to 87,981.29, 131,958.56 and 28,815.65 is: 43,219.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.29 : 131,958.56 = 28,815.65 : x
  2. Step 2: Convert to fraction form
    87,981.29/131,958.56 = 28,815.65/x
  3. Step 3: Cross multiply
    87,981.29x = 131,958.56 × 28,815.65
  4. Step 4: Simplify right side
    87,981.29x = 3,802,470,875.59
  5. Step 5: Solve for x
    x = 3,802,470,875.59/87,981.29
  6. Step 6: Final answer
    x = 43,219.09

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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.