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Finding the Fourth Proportional to 192,068.20, 288,102.30 and 81,245.80

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Solution

The fourth proportional to 192,068.20, 288,102.30 and 81,245.80 is: 121,868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,068.20 : 288,102.30 = 81,245.80 : x
  2. Step 2: Convert to fraction form
    192,068.20/288,102.30 = 81,245.80/x
  3. Step 3: Cross multiply
    192,068.20x = 288,102.30 × 81,245.80
  4. Step 4: Simplify right side
    192,068.20x = 23,407,101,845.34
  5. Step 5: Solve for x
    x = 23,407,101,845.34/192,068.20
  6. Step 6: Final answer
    x = 121,868.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.