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Finding the Fourth Proportional to 66,450, 91,701 and 36,642

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Solution

The fourth proportional to 66,450, 91,701 and 36,642 is: 50,565.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,450 : 91,701 = 36,642 : x
  2. Step 2: Convert to fraction form
    66,450/91,701 = 36,642/x
  3. Step 3: Cross multiply
    66,450x = 91,701 × 36,642
  4. Step 4: Simplify right side
    66,450x = 3,360,108,042
  5. Step 5: Solve for x
    x = 3,360,108,042/66,450
  6. Step 6: Final answer
    x = 50,565.96

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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.