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Finding the Fourth Proportional to 66,644.21, 91,969 and 36,429.65

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Solution

The fourth proportional to 66,644.21, 91,969 and 36,429.65 is: 50,272.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,644.21 : 91,969 = 36,429.65 : x
  2. Step 2: Convert to fraction form
    66,644.21/91,969 = 36,429.65/x
  3. Step 3: Cross multiply
    66,644.21x = 91,969 × 36,429.65
  4. Step 4: Simplify right side
    66,644.21x = 3,350,398,480.85
  5. Step 5: Solve for x
    x = 3,350,398,480.85/66,644.21
  6. Step 6: Final answer
    x = 50,272.91

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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.