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Finding the Fourth Proportional to 111,754.85, 166,579.48 and 102,786.80

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Solution

The fourth proportional to 111,754.85, 166,579.48 and 102,786.80 is: 153,211.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,754.85 : 166,579.48 = 102,786.80 : x
  2. Step 2: Convert to fraction form
    111,754.85/166,579.48 = 102,786.80/x
  3. Step 3: Cross multiply
    111,754.85x = 166,579.48 × 102,786.80
  4. Step 4: Simplify right side
    111,754.85x = 17,122,170,605.00
  5. Step 5: Solve for x
    x = 17,122,170,605.00/111,754.85
  6. Step 6: Final answer
    x = 153,211.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.