Home / 76,872.52-115,299.24-20,717.02

Finding the Fourth Proportional to 76,872.52, 115,299.24 and 20,717.02

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Solution

The fourth proportional to 76,872.52, 115,299.24 and 20,717.02 is: 31,072.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,872.52 : 115,299.24 = 20,717.02 : x
  2. Step 2: Convert to fraction form
    76,872.52/115,299.24 = 20,717.02/x
  3. Step 3: Cross multiply
    76,872.52x = 115,299.24 × 20,717.02
  4. Step 4: Simplify right side
    76,872.52x = 2,388,656,661.06
  5. Step 5: Solve for x
    x = 2,388,656,661.06/76,872.52
  6. Step 6: Final answer
    x = 31,072.96

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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.