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Finding the Fourth Proportional to 139,467.60, 192,450.60 and 82,871.28

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Solution

The fourth proportional to 139,467.60, 192,450.60 and 82,871.28 is: 114,353.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,467.60 : 192,450.60 = 82,871.28 : x
  2. Step 2: Convert to fraction form
    139,467.60/192,450.60 = 82,871.28/x
  3. Step 3: Cross multiply
    139,467.60x = 192,450.60 × 82,871.28
  4. Step 4: Simplify right side
    139,467.60x = 15,948,627,558.77
  5. Step 5: Solve for x
    x = 15,948,627,558.77/139,467.60
  6. Step 6: Final answer
    x = 114,353.64

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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.