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Finding the Fourth Proportional to 121,670.57, 167,903.60 and 67,956.33

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Solution

The fourth proportional to 121,670.57, 167,903.60 and 67,956.33 is: 93,778.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,670.57 : 167,903.60 = 67,956.33 : x
  2. Step 2: Convert to fraction form
    121,670.57/167,903.60 = 67,956.33/x
  3. Step 3: Cross multiply
    121,670.57x = 167,903.60 × 67,956.33
  4. Step 4: Simplify right side
    121,670.57x = 11,410,111,480.37
  5. Step 5: Solve for x
    x = 11,410,111,480.37/121,670.57
  6. Step 6: Final answer
    x = 93,778.73

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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.