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Finding the Fourth Proportional to 121,496.82, 167,661.81 and 71,229.30

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Solution

The fourth proportional to 121,496.82, 167,661.81 and 71,229.30 is: 98,294.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,496.82 : 167,661.81 = 71,229.30 : x
  2. Step 2: Convert to fraction form
    121,496.82/167,661.81 = 71,229.30/x
  3. Step 3: Cross multiply
    121,496.82x = 167,661.81 × 71,229.30
  4. Step 4: Simplify right side
    121,496.82x = 11,942,433,363.03
  5. Step 5: Solve for x
    x = 11,942,433,363.03/121,496.82
  6. Step 6: Final answer
    x = 98,294.21

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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.