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Finding the Fourth Proportional to 139,371.45, 192,333.09 and 82,012.98

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Solution

The fourth proportional to 139,371.45, 192,333.09 and 82,012.98 is: 113,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,371.45 : 192,333.09 = 82,012.98 : x
  2. Step 2: Convert to fraction form
    139,371.45/192,333.09 = 82,012.98/x
  3. Step 3: Cross multiply
    139,371.45x = 192,333.09 × 82,012.98
  4. Step 4: Simplify right side
    139,371.45x = 15,773,809,863.51
  5. Step 5: Solve for x
    x = 15,773,809,863.51/139,371.45
  6. Step 6: Final answer
    x = 113,178.20

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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.