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Finding the Fourth Proportional to 251,939, 347,675.82 and 138,761.75

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Solution

The fourth proportional to 251,939, 347,675.82 and 138,761.75 is: 191,491.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,939 : 347,675.82 = 138,761.75 : x
  2. Step 2: Convert to fraction form
    251,939/347,675.82 = 138,761.75/x
  3. Step 3: Cross multiply
    251,939x = 347,675.82 × 138,761.75
  4. Step 4: Simplify right side
    251,939x = 48,244,105,215.89
  5. Step 5: Solve for x
    x = 48,244,105,215.89/251,939
  6. Step 6: Final answer
    x = 191,491.22

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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.