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Finding the Fourth Proportional to 66,608.32, 91,918.41 and 36,393

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Solution

The fourth proportional to 66,608.32, 91,918.41 and 36,393 is: 50,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.32 : 91,918.41 = 36,393 : x
  2. Step 2: Convert to fraction form
    66,608.32/91,918.41 = 36,393/x
  3. Step 3: Cross multiply
    66,608.32x = 91,918.41 × 36,393
  4. Step 4: Simplify right side
    66,608.32x = 3,345,186,695.13
  5. Step 5: Solve for x
    x = 3,345,186,695.13/66,608.32
  6. Step 6: Final answer
    x = 50,221.75

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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.