Finding the Fourth Proportional to 128.27, 176.91 and 110.99
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Solution
The fourth proportional to 128.27, 176.91 and 110.99 is: 153.08
Step by Step Solution
- Step 1: Write the proportion equation
128.27 : 176.91 = 110.99 : x - Step 2: Convert to fraction form
128.27/176.91 = 110.99/x - Step 3: Cross multiply
128.27x = 176.91 × 110.99 - Step 4: Simplify right side
128.27x = 19,635.24 - Step 5: Solve for x
x = 19,635.24/128.27 - Step 6: Final answer
x = 153.08
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.