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Finding the Fourth Proportional to 66,651, 91,978.38 and 36,843

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Solution

The fourth proportional to 66,651, 91,978.38 and 36,843 is: 50,843.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,651 : 91,978.38 = 36,843 : x
  2. Step 2: Convert to fraction form
    66,651/91,978.38 = 36,843/x
  3. Step 3: Cross multiply
    66,651x = 91,978.38 × 36,843
  4. Step 4: Simplify right side
    66,651x = 3,388,759,454.34
  5. Step 5: Solve for x
    x = 3,388,759,454.34/66,651
  6. Step 6: Final answer
    x = 50,843.34

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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.