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Finding the Fourth Proportional to 168,072, 231,939.36 and 92,620.50

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Solution

The fourth proportional to 168,072, 231,939.36 and 92,620.50 is: 127,816.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,072 : 231,939.36 = 92,620.50 : x
  2. Step 2: Convert to fraction form
    168,072/231,939.36 = 92,620.50/x
  3. Step 3: Cross multiply
    168,072x = 231,939.36 × 92,620.50
  4. Step 4: Simplify right side
    168,072x = 21,482,339,492.88
  5. Step 5: Solve for x
    x = 21,482,339,492.88/168,072
  6. Step 6: Final answer
    x = 127,816.29

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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.