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Finding the Fourth Proportional to 120,351.69, 166,090.52 and 66,636.70

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Solution

The fourth proportional to 120,351.69, 166,090.52 and 66,636.70 is: 91,961.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,351.69 : 166,090.52 = 66,636.70 : x
  2. Step 2: Convert to fraction form
    120,351.69/166,090.52 = 66,636.70/x
  3. Step 3: Cross multiply
    120,351.69x = 166,090.52 × 66,636.70
  4. Step 4: Simplify right side
    120,351.69x = 11,067,724,154.08
  5. Step 5: Solve for x
    x = 11,067,724,154.08/120,351.69
  6. Step 6: Final answer
    x = 91,961.52

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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.