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Finding the Fourth Proportional to 172,324.25, 258,504.92 and 72,494.60

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Solution

The fourth proportional to 172,324.25, 258,504.92 and 72,494.60 is: 108,749.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,324.25 : 258,504.92 = 72,494.60 : x
  2. Step 2: Convert to fraction form
    172,324.25/258,504.92 = 72,494.60/x
  3. Step 3: Cross multiply
    172,324.25x = 258,504.92 × 72,494.60
  4. Step 4: Simplify right side
    172,324.25x = 18,740,210,410.96
  5. Step 5: Solve for x
    x = 18,740,210,410.96/172,324.25
  6. Step 6: Final answer
    x = 108,749.70

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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.