Finding the Fourth Proportional to 190.19, 285.30 and 81.99
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Solution
The fourth proportional to 190.19, 285.30 and 81.99 is: 122.99
Step by Step Solution
- Step 1: Write the proportion equation
190.19 : 285.30 = 81.99 : x - Step 2: Convert to fraction form
190.19/285.30 = 81.99/x - Step 3: Cross multiply
190.19x = 285.30 × 81.99 - Step 4: Simplify right side
190.19x = 23,391.75 - Step 5: Solve for x
x = 23,391.75/190.19 - Step 6: Final answer
x = 122.99
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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.