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Finding the Fourth Proportional to 172,712.78, 259,104.09 and 72,873.18

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Solution

The fourth proportional to 172,712.78, 259,104.09 and 72,873.18 is: 109,324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,712.78 : 259,104.09 = 72,873.18 : x
  2. Step 2: Convert to fraction form
    172,712.78/259,104.09 = 72,873.18/x
  3. Step 3: Cross multiply
    172,712.78x = 259,104.09 × 72,873.18
  4. Step 4: Simplify right side
    172,712.78x = 18,881,738,989.31
  5. Step 5: Solve for x
    x = 18,881,738,989.31/172,712.78
  6. Step 6: Final answer
    x = 109,324.51

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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.