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Finding the Fourth Proportional to 251,935.03, 347,654.39 and 138,757.78

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Solution

The fourth proportional to 251,935.03, 347,654.39 and 138,757.78 is: 191,476.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,935.03 : 347,654.39 = 138,757.78 : x
  2. Step 2: Convert to fraction form
    251,935.03/347,654.39 = 138,757.78/x
  3. Step 3: Cross multiply
    251,935.03x = 347,654.39 × 138,757.78
  4. Step 4: Simplify right side
    251,935.03x = 48,239,751,363.65
  5. Step 5: Solve for x
    x = 48,239,751,363.65/251,935.03
  6. Step 6: Final answer
    x = 191,476.95

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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.