Finding the Fourth Proportional to 135.81, 203.87 and 87.75
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Solution
The fourth proportional to 135.81, 203.87 and 87.75 is: 131.72
Step by Step Solution
- Step 1: Write the proportion equation
135.81 : 203.87 = 87.75 : x - Step 2: Convert to fraction form
135.81/203.87 = 87.75/x - Step 3: Cross multiply
135.81x = 203.87 × 87.75 - Step 4: Simplify right side
135.81x = 17,889.15 - Step 5: Solve for x
x = 17,889.15/135.81 - Step 6: Final answer
x = 131.72
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.