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Finding the Fourth Proportional to 168,005.72, 252,009 and 115,255.28

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Solution

The fourth proportional to 168,005.72, 252,009 and 115,255.28 is: 172,883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,005.72 : 252,009 = 115,255.28 : x
  2. Step 2: Convert to fraction form
    168,005.72/252,009 = 115,255.28/x
  3. Step 3: Cross multiply
    168,005.72x = 252,009 × 115,255.28
  4. Step 4: Simplify right side
    168,005.72x = 29,045,367,857.52
  5. Step 5: Solve for x
    x = 29,045,367,857.52/168,005.72
  6. Step 6: Final answer
    x = 172,883.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.