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Finding the Fourth Proportional to 66,919.60, 100,396.24 and 47,236.56

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Solution

The fourth proportional to 66,919.60, 100,396.24 and 47,236.56 is: 70,866.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.60 : 100,396.24 = 47,236.56 : x
  2. Step 2: Convert to fraction form
    66,919.60/100,396.24 = 47,236.56/x
  3. Step 3: Cross multiply
    66,919.60x = 100,396.24 × 47,236.56
  4. Step 4: Simplify right side
    66,919.60x = 4,742,373,014.53
  5. Step 5: Solve for x
    x = 4,742,373,014.53/66,919.60
  6. Step 6: Final answer
    x = 70,866.73

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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.