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Finding the Fourth Proportional to 76,993.43, 115,339.48 and 68,634.23

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Solution

The fourth proportional to 76,993.43, 115,339.48 and 68,634.23 is: 102,817.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,993.43 : 115,339.48 = 68,634.23 : x
  2. Step 2: Convert to fraction form
    76,993.43/115,339.48 = 68,634.23/x
  3. Step 3: Cross multiply
    76,993.43x = 115,339.48 × 68,634.23
  4. Step 4: Simplify right side
    76,993.43x = 7,916,235,650.12
  5. Step 5: Solve for x
    x = 7,916,235,650.12/76,993.43
  6. Step 6: Final answer
    x = 102,817.03

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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.