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Finding the Fourth Proportional to 66,718.80, 100,318.26 and 61,517.44

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Solution

The fourth proportional to 66,718.80, 100,318.26 and 61,517.44 is: 92,497.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,718.80 : 100,318.26 = 61,517.44 : x
  2. Step 2: Convert to fraction form
    66,718.80/100,318.26 = 61,517.44/x
  3. Step 3: Cross multiply
    66,718.80x = 100,318.26 × 61,517.44
  4. Step 4: Simplify right side
    66,718.80x = 6,171,322,976.83
  5. Step 5: Solve for x
    x = 6,171,322,976.83/66,718.80
  6. Step 6: Final answer
    x = 92,497.51

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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.