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Finding the Fourth Proportional to 172,970.10, 259,481.88 and 73,130.72

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Solution

The fourth proportional to 172,970.10, 259,481.88 and 73,130.72 is: 109,707.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,970.10 : 259,481.88 = 73,130.72 : x
  2. Step 2: Convert to fraction form
    172,970.10/259,481.88 = 73,130.72/x
  3. Step 3: Cross multiply
    172,970.10x = 259,481.88 × 73,130.72
  4. Step 4: Simplify right side
    172,970.10x = 18,976,095,413.94
  5. Step 5: Solve for x
    x = 18,976,095,413.94/172,970.10
  6. Step 6: Final answer
    x = 109,707.37

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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.