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Finding the Fourth Proportional to 121,380.54, 167,505.16 and 67,664.40

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Solution

The fourth proportional to 121,380.54, 167,505.16 and 67,664.40 is: 93,376.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,380.54 : 167,505.16 = 67,664.40 : x
  2. Step 2: Convert to fraction form
    121,380.54/167,505.16 = 67,664.40/x
  3. Step 3: Cross multiply
    121,380.54x = 167,505.16 × 67,664.40
  4. Step 4: Simplify right side
    121,380.54x = 11,334,136,148.30
  5. Step 5: Solve for x
    x = 11,334,136,148.30/121,380.54
  6. Step 6: Final answer
    x = 93,376.88

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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.