Finding the Fourth Proportional to 136.13, 203.92 and 81.99
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Solution
The fourth proportional to 136.13, 203.92 and 81.99 is: 122.82
Step by Step Solution
- Step 1: Write the proportion equation
136.13 : 203.92 = 81.99 : x - Step 2: Convert to fraction form
136.13/203.92 = 81.99/x - Step 3: Cross multiply
136.13x = 203.92 × 81.99 - Step 4: Simplify right side
136.13x = 16,719.40 - Step 5: Solve for x
x = 16,719.40/136.13 - Step 6: Final answer
x = 122.82
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.