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Finding the Fourth Proportional to 89,791.30, 134,687.62 and 39,857.97

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Solution

The fourth proportional to 89,791.30, 134,687.62 and 39,857.97 is: 59,787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,791.30 : 134,687.62 = 39,857.97 : x
  2. Step 2: Convert to fraction form
    89,791.30/134,687.62 = 39,857.97/x
  3. Step 3: Cross multiply
    89,791.30x = 134,687.62 × 39,857.97
  4. Step 4: Simplify right side
    89,791.30x = 5,368,375,117.33
  5. Step 5: Solve for x
    x = 5,368,375,117.33/89,791.30
  6. Step 6: Final answer
    x = 59,787.25

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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.