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Finding the Fourth Proportional to 139,696.38, 192,785.94 and 76,036.32

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Solution

The fourth proportional to 139,696.38, 192,785.94 and 76,036.32 is: 104,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,696.38 : 192,785.94 = 76,036.32 : x
  2. Step 2: Convert to fraction form
    139,696.38/192,785.94 = 76,036.32/x
  3. Step 3: Cross multiply
    139,696.38x = 192,785.94 × 76,036.32
  4. Step 4: Simplify right side
    139,696.38x = 14,658,733,425.34
  5. Step 5: Solve for x
    x = 14,658,733,425.34/139,696.38
  6. Step 6: Final answer
    x = 104,932.81

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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.