Finding the Fourth Proportional to 203.87, 305.57 and 81.99
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Solution
The fourth proportional to 203.87, 305.57 and 81.99 is: 122.89
Step by Step Solution
- Step 1: Write the proportion equation
203.87 : 305.57 = 81.99 : x - Step 2: Convert to fraction form
203.87/305.57 = 81.99/x - Step 3: Cross multiply
203.87x = 305.57 × 81.99 - Step 4: Simplify right side
203.87x = 25,053.89 - Step 5: Solve for x
x = 25,053.89/203.87 - Step 6: Final answer
x = 122.89
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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.