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Finding the Fourth Proportional to 251,375.64, 346,912.38 and 138,221.88

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Solution

The fourth proportional to 251,375.64, 346,912.38 and 138,221.88 is: 190,753.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,375.64 : 346,912.38 = 138,221.88 : x
  2. Step 2: Convert to fraction form
    251,375.64/346,912.38 = 138,221.88/x
  3. Step 3: Cross multiply
    251,375.64x = 346,912.38 × 138,221.88
  4. Step 4: Simplify right side
    251,375.64x = 47,950,881,358.87
  5. Step 5: Solve for x
    x = 47,950,881,358.87/251,375.64
  6. Step 6: Final answer
    x = 190,753.89

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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.