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Finding the Fourth Proportional to 77,621.94, 116,514.34 and 68,793.75

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Solution

The fourth proportional to 77,621.94, 116,514.34 and 68,793.75 is: 103,262.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,621.94 : 116,514.34 = 68,793.75 : x
  2. Step 2: Convert to fraction form
    77,621.94/116,514.34 = 68,793.75/x
  3. Step 3: Cross multiply
    77,621.94x = 116,514.34 × 68,793.75
  4. Step 4: Simplify right side
    77,621.94x = 8,015,458,205.39
  5. Step 5: Solve for x
    x = 8,015,458,205.39/77,621.94
  6. Step 6: Final answer
    x = 103,262.79

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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.