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Finding the Fourth Proportional to 81,791.63, 122,687.48 and 25,636.11

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Solution

The fourth proportional to 81,791.63, 122,687.48 and 25,636.11 is: 38,454.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,791.63 : 122,687.48 = 25,636.11 : x
  2. Step 2: Convert to fraction form
    81,791.63/122,687.48 = 25,636.11/x
  3. Step 3: Cross multiply
    81,791.63x = 122,687.48 × 25,636.11
  4. Step 4: Simplify right side
    81,791.63x = 3,145,229,604.72
  5. Step 5: Solve for x
    x = 3,145,229,604.72/81,791.63
  6. Step 6: Final answer
    x = 38,454.18

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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.