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Finding the Fourth Proportional to 251,448.48, 347,001.36 and 138,272

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Solution

The fourth proportional to 251,448.48, 347,001.36 and 138,272 is: 190,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,448.48 : 347,001.36 = 138,272 : x
  2. Step 2: Convert to fraction form
    251,448.48/347,001.36 = 138,272/x
  3. Step 3: Cross multiply
    251,448.48x = 347,001.36 × 138,272
  4. Step 4: Simplify right side
    251,448.48x = 47,980,572,049.92
  5. Step 5: Solve for x
    x = 47,980,572,049.92/251,448.48
  6. Step 6: Final answer
    x = 190,816.71

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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.