Finding the Fourth Proportional to 136.19, 187.95 and 77.99
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Solution
The fourth proportional to 136.19, 187.95 and 77.99 is: 107.63
Step by Step Solution
- Step 1: Write the proportion equation
136.19 : 187.95 = 77.99 : x - Step 2: Convert to fraction form
136.19/187.95 = 77.99/x - Step 3: Cross multiply
136.19x = 187.95 × 77.99 - Step 4: Simplify right side
136.19x = 14,658.22 - Step 5: Solve for x
x = 14,658.22/136.19 - Step 6: Final answer
x = 107.63
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.