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Finding the Fourth Proportional to 171,997.31, 257,896.64 and 66,693.26

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Solution

The fourth proportional to 171,997.31, 257,896.64 and 66,693.26 is: 100,001.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,997.31 : 257,896.64 = 66,693.26 : x
  2. Step 2: Convert to fraction form
    171,997.31/257,896.64 = 66,693.26/x
  3. Step 3: Cross multiply
    171,997.31x = 257,896.64 × 66,693.26
  4. Step 4: Simplify right side
    171,997.31x = 17,199,967,664.65
  5. Step 5: Solve for x
    x = 17,199,967,664.65/171,997.31
  6. Step 6: Final answer
    x = 100,001.38

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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.