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Finding the Fourth Proportional to 171,958.78, 258,006.21 and 66,807.82

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Solution

The fourth proportional to 171,958.78, 258,006.21 and 66,807.82 is: 100,238.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,958.78 : 258,006.21 = 66,807.82 : x
  2. Step 2: Convert to fraction form
    171,958.78/258,006.21 = 66,807.82/x
  3. Step 3: Cross multiply
    171,958.78x = 258,006.21 × 66,807.82
  4. Step 4: Simplify right side
    171,958.78x = 17,236,832,436.56
  5. Step 5: Solve for x
    x = 17,236,832,436.56/171,958.78
  6. Step 6: Final answer
    x = 100,238.16

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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.