Finding the Fourth Proportional to 135.68, 203.07 and 81.31
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Solution
The fourth proportional to 135.68, 203.07 and 81.31 is: 121.70
Step by Step Solution
- Step 1: Write the proportion equation
135.68 : 203.07 = 81.31 : x - Step 2: Convert to fraction form
135.68/203.07 = 81.31/x - Step 3: Cross multiply
135.68x = 203.07 × 81.31 - Step 4: Simplify right side
135.68x = 16,511.62 - Step 5: Solve for x
x = 16,511.62/135.68 - Step 6: Final answer
x = 121.70
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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.