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Finding the Fourth Proportional to 120,990.84, 166,941.48 and 82,242.12

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Solution

The fourth proportional to 120,990.84, 166,941.48 and 82,242.12 is: 113,476.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,990.84 : 166,941.48 = 82,242.12 : x
  2. Step 2: Convert to fraction form
    120,990.84/166,941.48 = 82,242.12/x
  3. Step 3: Cross multiply
    120,990.84x = 166,941.48 × 82,242.12
  4. Step 4: Simplify right side
    120,990.84x = 13,729,621,231.14
  5. Step 5: Solve for x
    x = 13,729,621,231.14/120,990.84
  6. Step 6: Final answer
    x = 113,476.53

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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.