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Finding the Fourth Proportional to 251,626.88, 347,245.92 and 138,456.64

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Solution

The fourth proportional to 251,626.88, 347,245.92 and 138,456.64 is: 191,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,626.88 : 347,245.92 = 138,456.64 : x
  2. Step 2: Convert to fraction form
    251,626.88/347,245.92 = 138,456.64/x
  3. Step 3: Cross multiply
    251,626.88x = 347,245.92 × 138,456.64
  4. Step 4: Simplify right side
    251,626.88x = 48,078,503,336.91
  5. Step 5: Solve for x
    x = 48,078,503,336.91/251,626.88
  6. Step 6: Final answer
    x = 191,070.62

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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.