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Finding the Fourth Proportional to 121,661.81, 167,889.89 and 67,945.25

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Solution

The fourth proportional to 121,661.81, 167,889.89 and 67,945.25 is: 93,762.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,661.81 : 167,889.89 = 67,945.25 : x
  2. Step 2: Convert to fraction form
    121,661.81/167,889.89 = 67,945.25/x
  3. Step 3: Cross multiply
    121,661.81x = 167,889.89 × 67,945.25
  4. Step 4: Simplify right side
    121,661.81x = 11,407,320,208.80
  5. Step 5: Solve for x
    x = 11,407,320,208.80/121,661.81
  6. Step 6: Final answer
    x = 93,762.54

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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.