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Finding the Fourth Proportional to 120,700.82, 166,572.82 and 66,986.30

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Solution

The fourth proportional to 120,700.82, 166,572.82 and 66,986.30 is: 92,444.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,700.82 : 166,572.82 = 66,986.30 : x
  2. Step 2: Convert to fraction form
    120,700.82/166,572.82 = 66,986.30/x
  3. Step 3: Cross multiply
    120,700.82x = 166,572.82 × 66,986.30
  4. Step 4: Simplify right side
    120,700.82x = 11,158,096,892.37
  5. Step 5: Solve for x
    x = 11,158,096,892.37/120,700.82
  6. Step 6: Final answer
    x = 92,444.25

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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.