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Finding the Fourth Proportional to 68,122.40, 102,183.60 and 21,375.20

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Solution

The fourth proportional to 68,122.40, 102,183.60 and 21,375.20 is: 32,062.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,122.40 : 102,183.60 = 21,375.20 : x
  2. Step 2: Convert to fraction form
    68,122.40/102,183.60 = 21,375.20/x
  3. Step 3: Cross multiply
    68,122.40x = 102,183.60 × 21,375.20
  4. Step 4: Simplify right side
    68,122.40x = 2,184,194,886.72
  5. Step 5: Solve for x
    x = 2,184,194,886.72/68,122.40
  6. Step 6: Final answer
    x = 32,062.80

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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.