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Finding the Fourth Proportional to 251,910.78, 347,620.88 and 138,733.54

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Solution

The fourth proportional to 251,910.78, 347,620.88 and 138,733.54 is: 191,443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,910.78 : 347,620.88 = 138,733.54 : x
  2. Step 2: Convert to fraction form
    251,910.78/347,620.88 = 138,733.54/x
  3. Step 3: Cross multiply
    251,910.78x = 347,620.88 × 138,733.54
  4. Step 4: Simplify right side
    251,910.78x = 48,226,675,260.32
  5. Step 5: Solve for x
    x = 48,226,675,260.32/251,910.78
  6. Step 6: Final answer
    x = 191,443.48

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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.