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Finding the Fourth Proportional to 121,661.31, 167,889.20 and 67,944.75

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Solution

The fourth proportional to 121,661.31, 167,889.20 and 67,944.75 is: 93,761.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,661.31 : 167,889.20 = 67,944.75 : x
  2. Step 2: Convert to fraction form
    121,661.31/167,889.20 = 67,944.75/x
  3. Step 3: Cross multiply
    121,661.31x = 167,889.20 × 67,944.75
  4. Step 4: Simplify right side
    121,661.31x = 11,407,189,381.98
  5. Step 5: Solve for x
    x = 11,407,189,381.98/121,661.31
  6. Step 6: Final answer
    x = 93,761.85

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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.