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Finding the Fourth Proportional to 121,305.43, 167,402.61 and 66,859.54

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Solution

The fourth proportional to 121,305.43, 167,402.61 and 66,859.54 is: 92,266.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,305.43 : 167,402.61 = 66,859.54 : x
  2. Step 2: Convert to fraction form
    121,305.43/167,402.61 = 66,859.54/x
  3. Step 3: Cross multiply
    121,305.43x = 167,402.61 × 66,859.54
  4. Step 4: Simplify right side
    121,305.43x = 11,192,461,499.40
  5. Step 5: Solve for x
    x = 11,192,461,499.40/121,305.43
  6. Step 6: Final answer
    x = 92,266.78

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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.