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Finding the Fourth Proportional to 121,612.56, 167,821.92 and 67,896

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Solution

The fourth proportional to 121,612.56, 167,821.92 and 67,896 is: 93,694.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,612.56 : 167,821.92 = 67,896 : x
  2. Step 2: Convert to fraction form
    121,612.56/167,821.92 = 67,896/x
  3. Step 3: Cross multiply
    121,612.56x = 167,821.92 × 67,896
  4. Step 4: Simplify right side
    121,612.56x = 11,394,437,080.32
  5. Step 5: Solve for x
    x = 11,394,437,080.32/121,612.56
  6. Step 6: Final answer
    x = 93,694.57

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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.