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Finding the Fourth Proportional to 120,372.82, 166,112.44 and 66,656.68

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Solution

The fourth proportional to 120,372.82, 166,112.44 and 66,656.68 is: 91,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,372.82 : 166,112.44 = 66,656.68 : x
  2. Step 2: Convert to fraction form
    120,372.82/166,112.44 = 66,656.68/x
  3. Step 3: Cross multiply
    120,372.82x = 166,112.44 × 66,656.68
  4. Step 4: Simplify right side
    120,372.82x = 11,072,503,757.10
  5. Step 5: Solve for x
    x = 11,072,503,757.10/120,372.82
  6. Step 6: Final answer
    x = 91,985.08

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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.