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Finding the Fourth Proportional to 111,369.24, 166,791.54 and 86,207.88

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Solution

The fourth proportional to 111,369.24, 166,791.54 and 86,207.88 is: 129,108.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,369.24 : 166,791.54 = 86,207.88 : x
  2. Step 2: Convert to fraction form
    111,369.24/166,791.54 = 86,207.88/x
  3. Step 3: Cross multiply
    111,369.24x = 166,791.54 × 86,207.88
  4. Step 4: Simplify right side
    111,369.24x = 14,378,745,065.34
  5. Step 5: Solve for x
    x = 14,378,745,065.34/111,369.24
  6. Step 6: Final answer
    x = 129,108.77

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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.