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Finding the Fourth Proportional to 172,705.96, 259,093.86 and 72,866.39

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Solution

The fourth proportional to 172,705.96, 259,093.86 and 72,866.39 is: 109,314.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,705.96 : 259,093.86 = 72,866.39 : x
  2. Step 2: Convert to fraction form
    172,705.96/259,093.86 = 72,866.39/x
  3. Step 3: Cross multiply
    172,705.96x = 259,093.86 × 72,866.39
  4. Step 4: Simplify right side
    172,705.96x = 18,879,233,885.03
  5. Step 5: Solve for x
    x = 18,879,233,885.03/172,705.96
  6. Step 6: Final answer
    x = 109,314.32

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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.