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Finding the Fourth Proportional to 55,611.20, 76,724.52 and 31,720.70

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Solution

The fourth proportional to 55,611.20, 76,724.52 and 31,720.70 is: 43,763.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,611.20 : 76,724.52 = 31,720.70 : x
  2. Step 2: Convert to fraction form
    55,611.20/76,724.52 = 31,720.70/x
  3. Step 3: Cross multiply
    55,611.20x = 76,724.52 × 31,720.70
  4. Step 4: Simplify right side
    55,611.20x = 2,433,755,481.56
  5. Step 5: Solve for x
    x = 2,433,755,481.56/55,611.20
  6. Step 6: Final answer
    x = 43,763.76

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