Finding the Fourth Proportional to 135,481.26, 186,946.44 and 78,122.70
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Solution
The fourth proportional to 135,481.26, 186,946.44 and 78,122.70 is: 107,799.12
Step by Step Solution
- Step 1: Write the proportion equation
135,481.26 : 186,946.44 = 78,122.70 : x - Step 2: Convert to fraction form
135,481.26/186,946.44 = 78,122.70/x - Step 3: Cross multiply
135,481.26x = 186,946.44 × 78,122.70 - Step 4: Simplify right side
135,481.26x = 14,604,760,648.19 - Step 5: Solve for x
x = 14,604,760,648.19/135,481.26 - Step 6: Final answer
x = 107,799.12
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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.