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Finding the Fourth Proportional to 168,062.72, 231,921.92 and 91,580.16

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Solution

The fourth proportional to 168,062.72, 231,921.92 and 91,580.16 is: 126,378.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,062.72 : 231,921.92 = 91,580.16 : x
  2. Step 2: Convert to fraction form
    168,062.72/231,921.92 = 91,580.16/x
  3. Step 3: Cross multiply
    168,062.72x = 231,921.92 × 91,580.16
  4. Step 4: Simplify right side
    168,062.72x = 21,239,446,541.11
  5. Step 5: Solve for x
    x = 21,239,446,541.11/168,062.72
  6. Step 6: Final answer
    x = 126,378.10

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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.