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Finding the Fourth Proportional to 171,305.88, 256,890.78 and 66,057.72

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Solution

The fourth proportional to 171,305.88, 256,890.78 and 66,057.72 is: 99,060.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,305.88 : 256,890.78 = 66,057.72 : x
  2. Step 2: Convert to fraction form
    171,305.88/256,890.78 = 66,057.72/x
  3. Step 3: Cross multiply
    171,305.88x = 256,890.78 × 66,057.72
  4. Step 4: Simplify right side
    171,305.88x = 16,969,619,215.82
  5. Step 5: Solve for x
    x = 16,969,619,215.82/171,305.88
  6. Step 6: Final answer
    x = 99,060.34

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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.