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Finding the Fourth Proportional to 68,872.40, 103,308.60 and 68,216.30

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Solution

The fourth proportional to 68,872.40, 103,308.60 and 68,216.30 is: 102,324.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,872.40 : 103,308.60 = 68,216.30 : x
  2. Step 2: Convert to fraction form
    68,872.40/103,308.60 = 68,216.30/x
  3. Step 3: Cross multiply
    68,872.40x = 103,308.60 × 68,216.30
  4. Step 4: Simplify right side
    68,872.40x = 7,047,330,450.18
  5. Step 5: Solve for x
    x = 7,047,330,450.18/68,872.40
  6. Step 6: Final answer
    x = 102,324.45

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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.