Finding the Fourth Proportional to 135.28, 203.10 and 81.28
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Solution
The fourth proportional to 135.28, 203.10 and 81.28 is: 122.03
Step by Step Solution
- Step 1: Write the proportion equation
135.28 : 203.10 = 81.28 : x - Step 2: Convert to fraction form
135.28/203.10 = 81.28/x - Step 3: Cross multiply
135.28x = 203.10 × 81.28 - Step 4: Simplify right side
135.28x = 16,507.97 - Step 5: Solve for x
x = 16,507.97/135.28 - Step 6: Final answer
x = 122.03
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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.