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Finding the Fourth Proportional to 66,389.62, 91,616.86 and 36,174.17

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Solution

The fourth proportional to 66,389.62, 91,616.86 and 36,174.17 is: 49,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389.62 : 91,616.86 = 36,174.17 : x
  2. Step 2: Convert to fraction form
    66,389.62/91,616.86 = 36,174.17/x
  3. Step 3: Cross multiply
    66,389.62x = 91,616.86 × 36,174.17
  4. Step 4: Simplify right side
    66,389.62x = 3,314,163,229.55
  5. Step 5: Solve for x
    x = 3,314,163,229.55/66,389.62
  6. Step 6: Final answer
    x = 49,919.90

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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.