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Finding the Fourth Proportional to 56,719.72, 85,059.74 and 16,728.09

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Solution

The fourth proportional to 56,719.72, 85,059.74 and 16,728.09 is: 25,086.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,719.72 : 85,059.74 = 16,728.09 : x
  2. Step 2: Convert to fraction form
    56,719.72/85,059.74 = 16,728.09/x
  3. Step 3: Cross multiply
    56,719.72x = 85,059.74 × 16,728.09
  4. Step 4: Simplify right side
    56,719.72x = 1,422,887,219.66
  5. Step 5: Solve for x
    x = 1,422,887,219.66/56,719.72
  6. Step 6: Final answer
    x = 25,086.29

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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.