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Finding the Fourth Proportional to 143,043.60, 214,662.60 and 79,863.60

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Solution

The fourth proportional to 143,043.60, 214,662.60 and 79,863.60 is: 119,849.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,043.60 : 214,662.60 = 79,863.60 : x
  2. Step 2: Convert to fraction form
    143,043.60/214,662.60 = 79,863.60/x
  3. Step 3: Cross multiply
    143,043.60x = 214,662.60 × 79,863.60
  4. Step 4: Simplify right side
    143,043.60x = 17,143,728,021.36
  5. Step 5: Solve for x
    x = 17,143,728,021.36/143,043.60
  6. Step 6: Final answer
    x = 119,849.67

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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.