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Finding the Fourth Proportional to 251,869.62, 347,578.47 and 138,691.50

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Solution

The fourth proportional to 251,869.62, 347,578.47 and 138,691.50 is: 191,393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,869.62 : 347,578.47 = 138,691.50 : x
  2. Step 2: Convert to fraction form
    251,869.62/347,578.47 = 138,691.50/x
  3. Step 3: Cross multiply
    251,869.62x = 347,578.47 × 138,691.50
  4. Step 4: Simplify right side
    251,869.62x = 48,206,179,372.01
  5. Step 5: Solve for x
    x = 48,206,179,372.01/251,869.62
  6. Step 6: Final answer
    x = 191,393.39

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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.