Finding the Fourth Proportional to 153.99, 231.02 and 76.99
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Solution
The fourth proportional to 153.99, 231.02 and 76.99 is: 115.50
Step by Step Solution
- Step 1: Write the proportion equation
153.99 : 231.02 = 76.99 : x - Step 2: Convert to fraction form
153.99/231.02 = 76.99/x - Step 3: Cross multiply
153.99x = 231.02 × 76.99 - Step 4: Simplify right side
153.99x = 17,786.23 - Step 5: Solve for x
x = 17,786.23/153.99 - Step 6: Final answer
x = 115.50
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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.