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Finding the Fourth Proportional to 111,916.80, 167,745.60 and 45,313.20

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Solution

The fourth proportional to 111,916.80, 167,745.60 and 45,313.20 is: 67,917.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,916.80 : 167,745.60 = 45,313.20 : x
  2. Step 2: Convert to fraction form
    111,916.80/167,745.60 = 45,313.20/x
  3. Step 3: Cross multiply
    111,916.80x = 167,745.60 × 45,313.20
  4. Step 4: Simplify right side
    111,916.80x = 7,601,089,921.92
  5. Step 5: Solve for x
    x = 7,601,089,921.92/111,916.80
  6. Step 6: Final answer
    x = 67,917.33

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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.