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Finding the Fourth Proportional to 251,910.80, 347,634.60 and 138,731.12

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Solution

The fourth proportional to 251,910.80, 347,634.60 and 138,731.12 is: 191,447.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,910.80 : 347,634.60 = 138,731.12 : x
  2. Step 2: Convert to fraction form
    251,910.80/347,634.60 = 138,731.12/x
  3. Step 3: Cross multiply
    251,910.80x = 347,634.60 × 138,731.12
  4. Step 4: Simplify right side
    251,910.80x = 48,227,737,408.75
  5. Step 5: Solve for x
    x = 48,227,737,408.75/251,910.80
  6. Step 6: Final answer
    x = 191,447.68

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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.