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Finding the Fourth Proportional to 121,077, 167,087.79 and 66,635.43

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Solution

The fourth proportional to 121,077, 167,087.79 and 66,635.43 is: 91,957.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,077 : 167,087.79 = 66,635.43 : x
  2. Step 2: Convert to fraction form
    121,077/167,087.79 = 66,635.43/x
  3. Step 3: Cross multiply
    121,077x = 167,087.79 × 66,635.43
  4. Step 4: Simplify right side
    121,077x = 11,133,967,517.62
  5. Step 5: Solve for x
    x = 11,133,967,517.62/121,077
  6. Step 6: Final answer
    x = 91,957.74

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1.5x scale

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.