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Finding the Fourth Proportional to 121,620.64, 167,834.88 and 67,906.56

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Solution

The fourth proportional to 121,620.64, 167,834.88 and 67,906.56 is: 93,710.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,620.64 : 167,834.88 = 67,906.56 : x
  2. Step 2: Convert to fraction form
    121,620.64/167,834.88 = 67,906.56/x
  3. Step 3: Cross multiply
    121,620.64x = 167,834.88 × 67,906.56
  4. Step 4: Simplify right side
    121,620.64x = 11,397,089,348.81
  5. Step 5: Solve for x
    x = 11,397,089,348.81/121,620.64
  6. Step 6: Final answer
    x = 93,710.16

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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.