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Finding the Fourth Proportional to 66,611.86, 91,921.68 and 36,396.42

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Solution

The fourth proportional to 66,611.86, 91,921.68 and 36,396.42 is: 50,225.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.86 : 91,921.68 = 36,396.42 : x
  2. Step 2: Convert to fraction form
    66,611.86/91,921.68 = 36,396.42/x
  3. Step 3: Cross multiply
    66,611.86x = 91,921.68 × 36,396.42
  4. Step 4: Simplify right side
    66,611.86x = 3,345,620,072.39
  5. Step 5: Solve for x
    x = 3,345,620,072.39/66,611.86
  6. Step 6: Final answer
    x = 50,225.59

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1.5x scale

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.