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Finding the Fourth Proportional to 121,156.70, 167,204.21 and 80,844.84

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Solution

The fourth proportional to 121,156.70, 167,204.21 and 80,844.84 is: 111,571.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,156.70 : 167,204.21 = 80,844.84 : x
  2. Step 2: Convert to fraction form
    121,156.70/167,204.21 = 80,844.84/x
  3. Step 3: Cross multiply
    121,156.70x = 167,204.21 × 80,844.84
  4. Step 4: Simplify right side
    121,156.70x = 13,517,597,200.55
  5. Step 5: Solve for x
    x = 13,517,597,200.55/121,156.70
  6. Step 6: Final answer
    x = 111,571.19

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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.