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Finding the Fourth Proportional to 120,663.16, 166,507.91 and 66,944.97

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Solution

The fourth proportional to 120,663.16, 166,507.91 and 66,944.97 is: 92,380.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,663.16 : 166,507.91 = 66,944.97 : x
  2. Step 2: Convert to fraction form
    120,663.16/166,507.91 = 66,944.97/x
  3. Step 3: Cross multiply
    120,663.16x = 166,507.91 × 66,944.97
  4. Step 4: Simplify right side
    120,663.16x = 11,146,867,039.71
  5. Step 5: Solve for x
    x = 11,146,867,039.71/120,663.16
  6. Step 6: Final answer
    x = 92,380.04

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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.