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Finding the Fourth Proportional to 81,791.16, 122,672.52 and 26,387.16

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Solution

The fourth proportional to 81,791.16, 122,672.52 and 26,387.16 is: 39,576.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,791.16 : 122,672.52 = 26,387.16 : x
  2. Step 2: Convert to fraction form
    81,791.16/122,672.52 = 26,387.16/x
  3. Step 3: Cross multiply
    81,791.16x = 122,672.52 × 26,387.16
  4. Step 4: Simplify right side
    81,791.16x = 3,236,979,412.84
  5. Step 5: Solve for x
    x = 3,236,979,412.84/81,791.16
  6. Step 6: Final answer
    x = 39,576.15

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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.