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Finding the Fourth Proportional to 61,990.72, 85,520.80 and 36,826.56

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Solution

The fourth proportional to 61,990.72, 85,520.80 and 36,826.56 is: 50,804.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,990.72 : 85,520.80 = 36,826.56 : x
  2. Step 2: Convert to fraction form
    61,990.72/85,520.80 = 36,826.56/x
  3. Step 3: Cross multiply
    61,990.72x = 85,520.80 × 36,826.56
  4. Step 4: Simplify right side
    61,990.72x = 3,149,436,872.45
  5. Step 5: Solve for x
    x = 3,149,436,872.45/61,990.72
  6. Step 6: Final answer
    x = 50,804.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.