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Finding the Fourth Proportional to 68,601.20, 103,074.60 and 43,653.20

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Solution

The fourth proportional to 68,601.20, 103,074.60 and 43,653.20 is: 65,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,601.20 : 103,074.60 = 43,653.20 : x
  2. Step 2: Convert to fraction form
    68,601.20/103,074.60 = 43,653.20/x
  3. Step 3: Cross multiply
    68,601.20x = 103,074.60 × 43,653.20
  4. Step 4: Simplify right side
    68,601.20x = 4,499,536,128.72
  5. Step 5: Solve for x
    x = 4,499,536,128.72/68,601.20
  6. Step 6: Final answer
    x = 65,589.76

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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.