Finding the Fourth Proportional to 128.18, 192.26 and 31.99
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Solution
The fourth proportional to 128.18, 192.26 and 31.99 is: 47.98
Step by Step Solution
- Step 1: Write the proportion equation
128.18 : 192.26 = 31.99 : x - Step 2: Convert to fraction form
128.18/192.26 = 31.99/x - Step 3: Cross multiply
128.18x = 192.26 × 31.99 - Step 4: Simplify right side
128.18x = 6,150.00 - Step 5: Solve for x
x = 6,150.00/128.18 - Step 6: Final answer
x = 47.98
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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.