Finding the Fourth Proportional to 129.28, 194.99 and 129.28
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Solution
The fourth proportional to 129.28, 194.99 and 129.28 is: 194.99
Step by Step Solution
- Step 1: Write the proportion equation
129.28 : 194.99 = 129.28 : x - Step 2: Convert to fraction form
129.28/194.99 = 129.28/x - Step 3: Cross multiply
129.28x = 194.99 × 129.28 - Step 4: Simplify right side
129.28x = 25,207.33 - Step 5: Solve for x
x = 25,207.33/129.28 - Step 6: Final answer
x = 194.99
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.