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Finding the Fourth Proportional to 81,396.64, 112,324.74 and 45,096.60

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Solution

The fourth proportional to 81,396.64, 112,324.74 and 45,096.60 is: 62,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,396.64 : 112,324.74 = 45,096.60 : x
  2. Step 2: Convert to fraction form
    81,396.64/112,324.74 = 45,096.60/x
  3. Step 3: Cross multiply
    81,396.64x = 112,324.74 × 45,096.60
  4. Step 4: Simplify right side
    81,396.64x = 5,065,463,869.88
  5. Step 5: Solve for x
    x = 5,065,463,869.88/81,396.64
  6. Step 6: Final answer
    x = 62,231.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.