Finding the Fourth Proportional to 129.13, 193.73 and 120.92
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Solution
The fourth proportional to 129.13, 193.73 and 120.92 is: 181.40
Step by Step Solution
- Step 1: Write the proportion equation
129.13 : 193.73 = 120.92 : x - Step 2: Convert to fraction form
129.13/193.73 = 120.92/x - Step 3: Cross multiply
129.13x = 193.73 × 120.92 - Step 4: Simplify right side
129.13x = 23,424.26 - Step 5: Solve for x
x = 23,424.26/129.13 - Step 6: Final answer
x = 181.40
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.