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Finding the Fourth Proportional to 56,810.80, 85,213.32 and 21,747.76

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Solution

The fourth proportional to 56,810.80, 85,213.32 and 21,747.76 is: 32,620.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,810.80 : 85,213.32 = 21,747.76 : x
  2. Step 2: Convert to fraction form
    56,810.80/85,213.32 = 21,747.76/x
  3. Step 3: Cross multiply
    56,810.80x = 85,213.32 × 21,747.76
  4. Step 4: Simplify right side
    56,810.80x = 1,853,198,832.16
  5. Step 5: Solve for x
    x = 1,853,198,832.16/56,810.80
  6. Step 6: Final answer
    x = 32,620.54

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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.