Finding the Fourth Proportional to 129.90, 195.26 and 120.99
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Solution
The fourth proportional to 129.90, 195.26 and 120.99 is: 181.87
Step by Step Solution
- Step 1: Write the proportion equation
129.90 : 195.26 = 120.99 : x - Step 2: Convert to fraction form
129.90/195.26 = 120.99/x - Step 3: Cross multiply
129.90x = 195.26 × 120.99 - Step 4: Simplify right side
129.90x = 23,624.51 - Step 5: Solve for x
x = 23,624.51/129.90 - Step 6: Final answer
x = 181.87
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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.