Finding the Fourth Proportional to 139,336.49, 192,286.56 and 78,905.49
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Solution
The fourth proportional to 139,336.49, 192,286.56 and 78,905.49 is: 108,890.83
Step by Step Solution
- Step 1: Write the proportion equation
139,336.49 : 192,286.56 = 78,905.49 : x - Step 2: Convert to fraction form
139,336.49/192,286.56 = 78,905.49/x - Step 3: Cross multiply
139,336.49x = 192,286.56 × 78,905.49 - Step 4: Simplify right side
139,336.49x = 15,172,465,237.21 - Step 5: Solve for x
x = 15,172,465,237.21/139,336.49 - Step 6: Final answer
x = 108,890.83
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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.