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Finding the Fourth Proportional to 171,608.85, 236,679.80 and 120,789.81

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Solution

The fourth proportional to 171,608.85, 236,679.80 and 120,789.81 is: 166,591.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,608.85 : 236,679.80 = 120,789.81 : x
  2. Step 2: Convert to fraction form
    171,608.85/236,679.80 = 120,789.81/x
  3. Step 3: Cross multiply
    171,608.85x = 236,679.80 × 120,789.81
  4. Step 4: Simplify right side
    171,608.85x = 28,588,508,072.84
  5. Step 5: Solve for x
    x = 28,588,508,072.84/171,608.85
  6. Step 6: Final answer
    x = 166,591.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.