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Finding the Fourth Proportional to 172,940.20, 259,410.30 and 122,201.80

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Solution

The fourth proportional to 172,940.20, 259,410.30 and 122,201.80 is: 183,302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,940.20 : 259,410.30 = 122,201.80 : x
  2. Step 2: Convert to fraction form
    172,940.20/259,410.30 = 122,201.80/x
  3. Step 3: Cross multiply
    172,940.20x = 259,410.30 × 122,201.80
  4. Step 4: Simplify right side
    172,940.20x = 31,700,405,598.54
  5. Step 5: Solve for x
    x = 31,700,405,598.54/172,940.20
  6. Step 6: Final answer
    x = 183,302.70

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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.