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Finding the Fourth Proportional to 56,912.72, 85,324.87 and 36,879.89

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Solution

The fourth proportional to 56,912.72, 85,324.87 and 36,879.89 is: 55,291.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,912.72 : 85,324.87 = 36,879.89 : x
  2. Step 2: Convert to fraction form
    56,912.72/85,324.87 = 36,879.89/x
  3. Step 3: Cross multiply
    56,912.72x = 85,324.87 × 36,879.89
  4. Step 4: Simplify right side
    56,912.72x = 3,146,771,635.46
  5. Step 5: Solve for x
    x = 3,146,771,635.46/56,912.72
  6. Step 6: Final answer
    x = 55,291.18

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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.