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Finding the Fourth Proportional to 111,739.64, 167,581.90 and 66,773.88

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Solution

The fourth proportional to 111,739.64, 167,581.90 and 66,773.88 is: 100,144.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,739.64 : 167,581.90 = 66,773.88 : x
  2. Step 2: Convert to fraction form
    111,739.64/167,581.90 = 66,773.88/x
  3. Step 3: Cross multiply
    111,739.64x = 167,581.90 × 66,773.88
  4. Step 4: Simplify right side
    111,739.64x = 11,190,093,680.77
  5. Step 5: Solve for x
    x = 11,190,093,680.77/111,739.64
  6. Step 6: Final answer
    x = 100,144.35

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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.