Finding the Fourth Proportional to 128.41, 192.34 and 97.99
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Solution
The fourth proportional to 128.41, 192.34 and 97.99 is: 146.78
Step by Step Solution
- Step 1: Write the proportion equation
128.41 : 192.34 = 97.99 : x - Step 2: Convert to fraction form
128.41/192.34 = 97.99/x - Step 3: Cross multiply
128.41x = 192.34 × 97.99 - Step 4: Simplify right side
128.41x = 18,847.40 - Step 5: Solve for x
x = 18,847.40/128.41 - Step 6: Final answer
x = 146.78
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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.