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Finding the Fourth Proportional to 238,791.44, 329,495.64 and 138,170

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Solution

The fourth proportional to 238,791.44, 329,495.64 and 138,170 is: 190,653.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,791.44 : 329,495.64 = 138,170 : x
  2. Step 2: Convert to fraction form
    238,791.44/329,495.64 = 138,170/x
  3. Step 3: Cross multiply
    238,791.44x = 329,495.64 × 138,170
  4. Step 4: Simplify right side
    238,791.44x = 45,526,412,578.80
  5. Step 5: Solve for x
    x = 45,526,412,578.80/238,791.44
  6. Step 6: Final answer
    x = 190,653.45

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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.