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Finding the Fourth Proportional to 121,380.78, 167,505.51 and 67,664.64

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Solution

The fourth proportional to 121,380.78, 167,505.51 and 67,664.64 is: 93,377.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,380.78 : 167,505.51 = 67,664.64 : x
  2. Step 2: Convert to fraction form
    121,380.78/167,505.51 = 67,664.64/x
  3. Step 3: Cross multiply
    121,380.78x = 167,505.51 × 67,664.64
  4. Step 4: Simplify right side
    121,380.78x = 11,334,200,032.17
  5. Step 5: Solve for x
    x = 11,334,200,032.17/121,380.78
  6. Step 6: Final answer
    x = 93,377.22

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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.