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Finding the Fourth Proportional to 66,616.17, 91,933.13 and 38,321.86

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Solution

The fourth proportional to 66,616.17, 91,933.13 and 38,321.86 is: 52,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,616.17 : 91,933.13 = 38,321.86 : x
  2. Step 2: Convert to fraction form
    66,616.17/91,933.13 = 38,321.86/x
  3. Step 3: Cross multiply
    66,616.17x = 91,933.13 × 38,321.86
  4. Step 4: Simplify right side
    66,616.17x = 3,523,048,360.01
  5. Step 5: Solve for x
    x = 3,523,048,360.01/66,616.17
  6. Step 6: Final answer
    x = 52,885.78

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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.