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Finding the Fourth Proportional to 121,380.66, 167,501.86 and 67,664.57

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Solution

The fourth proportional to 121,380.66, 167,501.86 and 67,664.57 is: 93,375.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,380.66 : 167,501.86 = 67,664.57 : x
  2. Step 2: Convert to fraction form
    121,380.66/167,501.86 = 67,664.57/x
  3. Step 3: Cross multiply
    121,380.66x = 167,501.86 × 67,664.57
  4. Step 4: Simplify right side
    121,380.66x = 11,333,940,324.43
  5. Step 5: Solve for x
    x = 11,333,940,324.43/121,380.66
  6. Step 6: Final answer
    x = 93,375.17

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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.