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Finding the Fourth Proportional to 168,071.72, 231,930.42 and 92,605.64

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Solution

The fourth proportional to 168,071.72, 231,930.42 and 92,605.64 is: 127,791.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,071.72 : 231,930.42 = 92,605.64 : x
  2. Step 2: Convert to fraction form
    168,071.72/231,930.42 = 92,605.64/x
  3. Step 3: Cross multiply
    168,071.72x = 231,930.42 × 92,605.64
  4. Step 4: Simplify right side
    168,071.72x = 21,478,064,979.57
  5. Step 5: Solve for x
    x = 21,478,064,979.57/168,071.72
  6. Step 6: Final answer
    x = 127,791.07

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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.