Finding the Fourth Proportional to 136.91, 189.81 and 129.99
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Solution
The fourth proportional to 136.91, 189.81 and 129.99 is: 180.22
Step by Step Solution
- Step 1: Write the proportion equation
136.91 : 189.81 = 129.99 : x - Step 2: Convert to fraction form
136.91/189.81 = 129.99/x - Step 3: Cross multiply
136.91x = 189.81 × 129.99 - Step 4: Simplify right side
136.91x = 24,673.40 - Step 5: Solve for x
x = 24,673.40/136.91 - Step 6: Final answer
x = 180.22
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.