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Finding the Fourth Proportional to 172,976.40, 259,440.30 and 54,659.70

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Solution

The fourth proportional to 172,976.40, 259,440.30 and 54,659.70 is: 81,981.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,976.40 : 259,440.30 = 54,659.70 : x
  2. Step 2: Convert to fraction form
    172,976.40/259,440.30 = 54,659.70/x
  3. Step 3: Cross multiply
    172,976.40x = 259,440.30 × 54,659.70
  4. Step 4: Simplify right side
    172,976.40x = 14,180,928,965.91
  5. Step 5: Solve for x
    x = 14,180,928,965.91/172,976.40
  6. Step 6: Final answer
    x = 81,981.87

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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.