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Finding the Fourth Proportional to 121,596.92, 167,671.50 and 79,076.60

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Solution

The fourth proportional to 121,596.92, 167,671.50 and 79,076.60 is: 109,039.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,596.92 : 167,671.50 = 79,076.60 : x
  2. Step 2: Convert to fraction form
    121,596.92/167,671.50 = 79,076.60/x
  3. Step 3: Cross multiply
    121,596.92x = 167,671.50 × 79,076.60
  4. Step 4: Simplify right side
    121,596.92x = 13,258,892,136.90
  5. Step 5: Solve for x
    x = 13,258,892,136.90/121,596.92
  6. Step 6: Final answer
    x = 109,039.70

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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.