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Finding the Fourth Proportional to 251,396.64, 346,918.50 and 138,218.52

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Solution

The fourth proportional to 251,396.64, 346,918.50 and 138,218.52 is: 190,736.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,396.64 : 346,918.50 = 138,218.52 : x
  2. Step 2: Convert to fraction form
    251,396.64/346,918.50 = 138,218.52/x
  3. Step 3: Cross multiply
    251,396.64x = 346,918.50 × 138,218.52
  4. Step 4: Simplify right side
    251,396.64x = 47,950,561,630.62
  5. Step 5: Solve for x
    x = 47,950,561,630.62/251,396.64
  6. Step 6: Final answer
    x = 190,736.68

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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.