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Finding the Fourth Proportional to 172,879.92, 259,140.06 and 72,956.70

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Solution

The fourth proportional to 172,879.92, 259,140.06 and 72,956.70 is: 109,359.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,879.92 : 259,140.06 = 72,956.70 : x
  2. Step 2: Convert to fraction form
    172,879.92/259,140.06 = 72,956.70/x
  3. Step 3: Cross multiply
    172,879.92x = 259,140.06 × 72,956.70
  4. Step 4: Simplify right side
    172,879.92x = 18,906,003,615.40
  5. Step 5: Solve for x
    x = 18,906,003,615.40/172,879.92
  6. Step 6: Final answer
    x = 109,359.16

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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.