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Finding the Fourth Proportional to 121,687.66, 167,912.37 and 67,965.82

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Solution

The fourth proportional to 121,687.66, 167,912.37 and 67,965.82 is: 93,783.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,687.66 : 167,912.37 = 67,965.82 : x
  2. Step 2: Convert to fraction form
    121,687.66/167,912.37 = 67,965.82/x
  3. Step 3: Cross multiply
    121,687.66x = 167,912.37 × 67,965.82
  4. Step 4: Simplify right side
    121,687.66x = 11,412,301,915.19
  5. Step 5: Solve for x
    x = 11,412,301,915.19/121,687.66
  6. Step 6: Final answer
    x = 93,783.56

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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.