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Finding the Fourth Proportional to 171,958.28, 258,005.46 and 66,807.32

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Solution

The fourth proportional to 171,958.28, 258,005.46 and 66,807.32 is: 100,237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,958.28 : 258,005.46 = 66,807.32 : x
  2. Step 2: Convert to fraction form
    171,958.28/258,005.46 = 66,807.32/x
  3. Step 3: Cross multiply
    171,958.28x = 258,005.46 × 66,807.32
  4. Step 4: Simplify right side
    171,958.28x = 17,236,653,327.97
  5. Step 5: Solve for x
    x = 17,236,653,327.97/171,958.28
  6. Step 6: Final answer
    x = 100,237.41

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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.