Finding the Fourth Proportional to 128.80, 193.18 and 34.99
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Solution
The fourth proportional to 128.80, 193.18 and 34.99 is: 52.48
Step by Step Solution
- Step 1: Write the proportion equation
128.80 : 193.18 = 34.99 : x - Step 2: Convert to fraction form
128.80/193.18 = 34.99/x - Step 3: Cross multiply
128.80x = 193.18 × 34.99 - Step 4: Simplify right side
128.80x = 6,759.36 - Step 5: Solve for x
x = 6,759.36/128.80 - Step 6: Final answer
x = 52.48
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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.