Finding the Fourth Proportional to 135.37, 203.08 and 81.20
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Solution
The fourth proportional to 135.37, 203.08 and 81.20 is: 121.81
Step by Step Solution
- Step 1: Write the proportion equation
135.37 : 203.08 = 81.20 : x - Step 2: Convert to fraction form
135.37/203.08 = 81.20/x - Step 3: Cross multiply
135.37x = 203.08 × 81.20 - Step 4: Simplify right side
135.37x = 16,490.10 - Step 5: Solve for x
x = 16,490.10/135.37 - Step 6: Final answer
x = 121.81
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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.