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Finding the Fourth Proportional to 56,778.60, 85,179.78 and 19,335.72

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Solution

The fourth proportional to 56,778.60, 85,179.78 and 19,335.72 is: 29,007.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,778.60 : 85,179.78 = 19,335.72 : x
  2. Step 2: Convert to fraction form
    56,778.60/85,179.78 = 19,335.72/x
  3. Step 3: Cross multiply
    56,778.60x = 85,179.78 × 19,335.72
  4. Step 4: Simplify right side
    56,778.60x = 1,647,012,375.74
  5. Step 5: Solve for x
    x = 1,647,012,375.74/56,778.60
  6. Step 6: Final answer
    x = 29,007.63

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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.