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Finding the Fourth Proportional to 139,271.81, 192,133.42 and 82,650.38

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Solution

The fourth proportional to 139,271.81, 192,133.42 and 82,650.38 is: 114,020.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,271.81 : 192,133.42 = 82,650.38 : x
  2. Step 2: Convert to fraction form
    139,271.81/192,133.42 = 82,650.38/x
  3. Step 3: Cross multiply
    139,271.81x = 192,133.42 × 82,650.38
  4. Step 4: Simplify right side
    139,271.81x = 15,879,899,006.41
  5. Step 5: Solve for x
    x = 15,879,899,006.41/139,271.81
  6. Step 6: Final answer
    x = 114,020.92

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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.