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Finding the Fourth Proportional to 66,611.60, 91,923.86 and 36,397.15

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Solution

The fourth proportional to 66,611.60, 91,923.86 and 36,397.15 is: 50,227.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.60 : 91,923.86 = 36,397.15 : x
  2. Step 2: Convert to fraction form
    66,611.60/91,923.86 = 36,397.15/x
  3. Step 3: Cross multiply
    66,611.60x = 91,923.86 × 36,397.15
  4. Step 4: Simplify right side
    66,611.60x = 3,345,766,382.18
  5. Step 5: Solve for x
    x = 3,345,766,382.18/66,611.60
  6. Step 6: Final answer
    x = 50,227.98

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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.