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Finding the Fourth Proportional to 74,121.56, 110,965.46 and 45,956.64

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Solution

The fourth proportional to 74,121.56, 110,965.46 and 45,956.64 is: 68,800.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,121.56 : 110,965.46 = 45,956.64 : x
  2. Step 2: Convert to fraction form
    74,121.56/110,965.46 = 45,956.64/x
  3. Step 3: Cross multiply
    74,121.56x = 110,965.46 × 45,956.64
  4. Step 4: Simplify right side
    74,121.56x = 5,099,600,142.50
  5. Step 5: Solve for x
    x = 5,099,600,142.50/74,121.56
  6. Step 6: Final answer
    x = 68,800.50

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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.