Finding the Fourth Proportional to 129,695.82, 178,982.97 and 73,107.18
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Solution
The fourth proportional to 129,695.82, 178,982.97 and 73,107.18 is: 100,889.45
Step by Step Solution
- Step 1: Write the proportion equation
129,695.82 : 178,982.97 = 73,107.18 : x - Step 2: Convert to fraction form
129,695.82/178,982.97 = 73,107.18/x - Step 3: Cross multiply
129,695.82x = 178,982.97 × 73,107.18 - Step 4: Simplify right side
129,695.82x = 13,084,940,204.72 - Step 5: Solve for x
x = 13,084,940,204.72/129,695.82 - Step 6: Final answer
x = 100,889.45
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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.