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Finding the Fourth Proportional to 111,691.92, 167,537.56 and 45,131.28

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Solution

The fourth proportional to 111,691.92, 167,537.56 and 45,131.28 is: 67,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,691.92 : 167,537.56 = 45,131.28 : x
  2. Step 2: Convert to fraction form
    111,691.92/167,537.56 = 45,131.28/x
  3. Step 3: Cross multiply
    111,691.92x = 167,537.56 × 45,131.28
  4. Step 4: Simplify right side
    111,691.92x = 7,561,184,530.88
  5. Step 5: Solve for x
    x = 7,561,184,530.88/111,691.92
  6. Step 6: Final answer
    x = 67,696.79

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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.