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Finding the Fourth Proportional to 251,553.20, 347,148.79 and 138,375.95

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Solution

The fourth proportional to 251,553.20, 347,148.79 and 138,375.95 is: 190,961.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,553.20 : 347,148.79 = 138,375.95 : x
  2. Step 2: Convert to fraction form
    251,553.20/347,148.79 = 138,375.95/x
  3. Step 3: Cross multiply
    251,553.20x = 347,148.79 × 138,375.95
  4. Step 4: Simplify right side
    251,553.20x = 48,037,041,525.92
  5. Step 5: Solve for x
    x = 48,037,041,525.92/251,553.20
  6. Step 6: Final answer
    x = 190,961.76

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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.