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Finding the Fourth Proportional to 111,839.13, 167,618.34 and 66,893.72

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Solution

The fourth proportional to 111,839.13, 167,618.34 and 66,893.72 is: 100,256.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,839.13 : 167,618.34 = 66,893.72 : x
  2. Step 2: Convert to fraction form
    111,839.13/167,618.34 = 66,893.72/x
  3. Step 3: Cross multiply
    111,839.13x = 167,618.34 × 66,893.72
  4. Step 4: Simplify right side
    111,839.13x = 11,212,613,464.73
  5. Step 5: Solve for x
    x = 11,212,613,464.73/111,839.13
  6. Step 6: Final answer
    x = 100,256.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.