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Finding the Fourth Proportional to 251,968.38, 347,716.38 and 138,791.13

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Solution

The fourth proportional to 251,968.38, 347,716.38 and 138,791.13 is: 191,531.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,968.38 : 347,716.38 = 138,791.13 : x
  2. Step 2: Convert to fraction form
    251,968.38/347,716.38 = 138,791.13/x
  3. Step 3: Cross multiply
    251,968.38x = 347,716.38 × 138,791.13
  4. Step 4: Simplify right side
    251,968.38x = 48,259,949,299.71
  5. Step 5: Solve for x
    x = 48,259,949,299.71/251,968.38
  6. Step 6: Final answer
    x = 191,531.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.