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Finding the Fourth Proportional to 76,879.52, 115,310.70 and 20,725.22

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Solution

The fourth proportional to 76,879.52, 115,310.70 and 20,725.22 is: 31,085.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,879.52 : 115,310.70 = 20,725.22 : x
  2. Step 2: Convert to fraction form
    76,879.52/115,310.70 = 20,725.22/x
  3. Step 3: Cross multiply
    76,879.52x = 115,310.70 × 20,725.22
  4. Step 4: Simplify right side
    76,879.52x = 2,389,839,625.85
  5. Step 5: Solve for x
    x = 2,389,839,625.85/76,879.52
  6. Step 6: Final answer
    x = 31,085.52

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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.