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Finding the Fourth Proportional to 255,786.20, 383,678.70 and 68,797.88

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Solution

The fourth proportional to 255,786.20, 383,678.70 and 68,797.88 is: 103,196.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,786.20 : 383,678.70 = 68,797.88 : x
  2. Step 2: Convert to fraction form
    255,786.20/383,678.70 = 68,797.88/x
  3. Step 3: Cross multiply
    255,786.20x = 383,678.70 × 68,797.88
  4. Step 4: Simplify right side
    255,786.20x = 26,396,281,161.16
  5. Step 5: Solve for x
    x = 26,396,281,161.16/255,786.20
  6. Step 6: Final answer
    x = 103,196.66

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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.