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Finding the Fourth Proportional to 255,719.30, 383,578.41 and 68,730.80

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Solution

The fourth proportional to 255,719.30, 383,578.41 and 68,730.80 is: 103,096.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,719.30 : 383,578.41 = 68,730.80 : x
  2. Step 2: Convert to fraction form
    255,719.30/383,578.41 = 68,730.80/x
  3. Step 3: Cross multiply
    255,719.30x = 383,578.41 × 68,730.80
  4. Step 4: Simplify right side
    255,719.30x = 26,363,650,982.03
  5. Step 5: Solve for x
    x = 26,363,650,982.03/255,719.30
  6. Step 6: Final answer
    x = 103,096.05

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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.