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Finding the Fourth Proportional to 251,869, 347,579.22 and 138,691.48

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Solution

The fourth proportional to 251,869, 347,579.22 and 138,691.48 is: 191,394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,869 : 347,579.22 = 138,691.48 : x
  2. Step 2: Convert to fraction form
    251,869/347,579.22 = 138,691.48/x
  3. Step 3: Cross multiply
    251,869x = 347,579.22 × 138,691.48
  4. Step 4: Simplify right side
    251,869x = 48,206,276,439.05
  5. Step 5: Solve for x
    x = 48,206,276,439.05/251,869
  6. Step 6: Final answer
    x = 191,394.24

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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.