Finding the Fourth Proportional to 135.09, 202.80 and 81.03
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Solution
The fourth proportional to 135.09, 202.80 and 81.03 is: 121.64
Step by Step Solution
- Step 1: Write the proportion equation
135.09 : 202.80 = 81.03 : x - Step 2: Convert to fraction form
135.09/202.80 = 81.03/x - Step 3: Cross multiply
135.09x = 202.80 × 81.03 - Step 4: Simplify right side
135.09x = 16,432.88 - Step 5: Solve for x
x = 16,432.88/135.09 - Step 6: Final answer
x = 121.64
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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.