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Finding the Fourth Proportional to 139,379.54, 192,360.02 and 82,790.91

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Solution

The fourth proportional to 139,379.54, 192,360.02 and 82,790.91 is: 114,261.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,379.54 : 192,360.02 = 82,790.91 : x
  2. Step 2: Convert to fraction form
    139,379.54/192,360.02 = 82,790.91/x
  3. Step 3: Cross multiply
    139,379.54x = 192,360.02 × 82,790.91
  4. Step 4: Simplify right side
    139,379.54x = 15,925,660,689.46
  5. Step 5: Solve for x
    x = 15,925,660,689.46/139,379.54
  6. Step 6: Final answer
    x = 114,261.11

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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.