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Finding the Fourth Proportional to 68,878.20, 103,231.20 and 29,389.20

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Solution

The fourth proportional to 68,878.20, 103,231.20 and 29,389.20 is: 44,047.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.20 : 103,231.20 = 29,389.20 : x
  2. Step 2: Convert to fraction form
    68,878.20/103,231.20 = 29,389.20/x
  3. Step 3: Cross multiply
    68,878.20x = 103,231.20 × 29,389.20
  4. Step 4: Simplify right side
    68,878.20x = 3,033,882,383.04
  5. Step 5: Solve for x
    x = 3,033,882,383.04/68,878.20
  6. Step 6: Final answer
    x = 44,047.06

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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.