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Finding the Fourth Proportional to 172,828, 259,344.06 and 72,981.73

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Solution

The fourth proportional to 172,828, 259,344.06 and 72,981.73 is: 109,515.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,828 : 259,344.06 = 72,981.73 : x
  2. Step 2: Convert to fraction form
    172,828/259,344.06 = 72,981.73/x
  3. Step 3: Cross multiply
    172,828x = 259,344.06 × 72,981.73
  4. Step 4: Simplify right side
    172,828x = 18,927,378,164.02
  5. Step 5: Solve for x
    x = 18,927,378,164.02/172,828
  6. Step 6: Final answer
    x = 109,515.69

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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.