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Finding the Fourth Proportional to 111,469.40, 167,197.74 and 81,514.28

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Solution

The fourth proportional to 111,469.40, 167,197.74 and 81,514.28 is: 122,266.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,469.40 : 167,197.74 = 81,514.28 : x
  2. Step 2: Convert to fraction form
    111,469.40/167,197.74 = 81,514.28/x
  3. Step 3: Cross multiply
    111,469.40x = 167,197.74 × 81,514.28
  4. Step 4: Simplify right side
    111,469.40x = 13,629,003,393.73
  5. Step 5: Solve for x
    x = 13,629,003,393.73/111,469.40
  6. Step 6: Final answer
    x = 122,266.77

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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.