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Finding the Fourth Proportional to 111,161.63, 166,749.91 and 39,105.92

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Solution

The fourth proportional to 111,161.63, 166,749.91 and 39,105.92 is: 58,661.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,161.63 : 166,749.91 = 39,105.92 : x
  2. Step 2: Convert to fraction form
    111,161.63/166,749.91 = 39,105.92/x
  3. Step 3: Cross multiply
    111,161.63x = 166,749.91 × 39,105.92
  4. Step 4: Simplify right side
    111,161.63x = 6,520,908,959.58
  5. Step 5: Solve for x
    x = 6,520,908,959.58/111,161.63
  6. Step 6: Final answer
    x = 58,661.51

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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.