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Finding the Fourth Proportional to 56,668.78, 85,012.89 and 17,229.88

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Solution

The fourth proportional to 56,668.78, 85,012.89 and 17,229.88 is: 25,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,668.78 : 85,012.89 = 17,229.88 : x
  2. Step 2: Convert to fraction form
    56,668.78/85,012.89 = 17,229.88/x
  3. Step 3: Cross multiply
    56,668.78x = 85,012.89 × 17,229.88
  4. Step 4: Simplify right side
    56,668.78x = 1,464,761,893.15
  5. Step 5: Solve for x
    x = 1,464,761,893.15/56,668.78
  6. Step 6: Final answer
    x = 25,847.78

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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.