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Finding the Fourth Proportional to 121,512, 167,693.04 and 71,227.20

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Solution

The fourth proportional to 121,512, 167,693.04 and 71,227.20 is: 98,297.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,512 : 167,693.04 = 71,227.20 : x
  2. Step 2: Convert to fraction form
    121,512/167,693.04 = 71,227.20/x
  3. Step 3: Cross multiply
    121,512x = 167,693.04 × 71,227.20
  4. Step 4: Simplify right side
    121,512x = 11,944,305,698.69
  5. Step 5: Solve for x
    x = 11,944,305,698.69/121,512
  6. Step 6: Final answer
    x = 98,297.33

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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.