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Finding the Fourth Proportional to 251,872, 347,583.36 and 138,694.48

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Solution

The fourth proportional to 251,872, 347,583.36 and 138,694.48 is: 191,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,872 : 347,583.36 = 138,694.48 : x
  2. Step 2: Convert to fraction form
    251,872/347,583.36 = 138,694.48/x
  3. Step 3: Cross multiply
    251,872x = 347,583.36 × 138,694.48
  4. Step 4: Simplify right side
    251,872x = 48,207,893,371.85
  5. Step 5: Solve for x
    x = 48,207,893,371.85/251,872
  6. Step 6: Final answer
    x = 191,398.38

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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.