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Finding the Fourth Proportional to 251,934.78, 347,654.05 and 138,757.53

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Solution

The fourth proportional to 251,934.78, 347,654.05 and 138,757.53 is: 191,476.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,934.78 : 347,654.05 = 138,757.53 : x
  2. Step 2: Convert to fraction form
    251,934.78/347,654.05 = 138,757.53/x
  3. Step 3: Cross multiply
    251,934.78x = 347,654.05 × 138,757.53
  4. Step 4: Simplify right side
    251,934.78x = 48,239,616,925.60
  5. Step 5: Solve for x
    x = 48,239,616,925.60/251,934.78
  6. Step 6: Final answer
    x = 191,476.61

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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.