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Finding the Fourth Proportional to 66,398, 91,628.04 and 36,183.59

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Solution

The fourth proportional to 66,398, 91,628.04 and 36,183.59 is: 49,932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,398 : 91,628.04 = 36,183.59 : x
  2. Step 2: Convert to fraction form
    66,398/91,628.04 = 36,183.59/x
  3. Step 3: Cross multiply
    66,398x = 91,628.04 × 36,183.59
  4. Step 4: Simplify right side
    66,398x = 3,315,431,431.86
  5. Step 5: Solve for x
    x = 3,315,431,431.86/66,398
  6. Step 6: Final answer
    x = 49,932.70

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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.