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Finding the Fourth Proportional to 172,707.21, 259,095.73 and 72,867.64

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Solution

The fourth proportional to 172,707.21, 259,095.73 and 72,867.64 is: 109,316.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,707.21 : 259,095.73 = 72,867.64 : x
  2. Step 2: Convert to fraction form
    172,707.21/259,095.73 = 72,867.64/x
  3. Step 3: Cross multiply
    172,707.21x = 259,095.73 × 72,867.64
  4. Step 4: Simplify right side
    172,707.21x = 18,879,694,379.18
  5. Step 5: Solve for x
    x = 18,879,694,379.18/172,707.21
  6. Step 6: Final answer
    x = 109,316.19

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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.