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Finding the Fourth Proportional to 68,003.10, 101,968.20 and 28,515.60

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Solution

The fourth proportional to 68,003.10, 101,968.20 and 28,515.60 is: 42,758.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,003.10 : 101,968.20 = 28,515.60 : x
  2. Step 2: Convert to fraction form
    68,003.10/101,968.20 = 28,515.60/x
  3. Step 3: Cross multiply
    68,003.10x = 101,968.20 × 28,515.60
  4. Step 4: Simplify right side
    68,003.10x = 2,907,684,403.92
  5. Step 5: Solve for x
    x = 2,907,684,403.92/68,003.10
  6. Step 6: Final answer
    x = 42,758.12

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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.