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Finding the Fourth Proportional to 76,044.75, 114,067.13 and 20,640.75

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Solution

The fourth proportional to 76,044.75, 114,067.13 and 20,640.75 is: 30,961.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,044.75 : 114,067.13 = 20,640.75 : x
  2. Step 2: Convert to fraction form
    76,044.75/114,067.13 = 20,640.75/x
  3. Step 3: Cross multiply
    76,044.75x = 114,067.13 × 20,640.75
  4. Step 4: Simplify right side
    76,044.75x = 2,354,431,010.34
  5. Step 5: Solve for x
    x = 2,354,431,010.34/76,044.75
  6. Step 6: Final answer
    x = 30,961.13

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1.5x scale

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.