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Finding the Fourth Proportional to 66,609, 91,920.42 and 36,801

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Solution

The fourth proportional to 66,609, 91,920.42 and 36,801 is: 50,785.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609 : 91,920.42 = 36,801 : x
  2. Step 2: Convert to fraction form
    66,609/91,920.42 = 36,801/x
  3. Step 3: Cross multiply
    66,609x = 91,920.42 × 36,801
  4. Step 4: Simplify right side
    66,609x = 3,382,763,376.42
  5. Step 5: Solve for x
    x = 3,382,763,376.42/66,609
  6. Step 6: Final answer
    x = 50,785.38

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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.