Finding the Fourth Proportional to 135.36, 202.68 and 115.20
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Solution
The fourth proportional to 135.36, 202.68 and 115.20 is: 172.49
Step by Step Solution
- Step 1: Write the proportion equation
135.36 : 202.68 = 115.20 : x - Step 2: Convert to fraction form
135.36/202.68 = 115.20/x - Step 3: Cross multiply
135.36x = 202.68 × 115.20 - Step 4: Simplify right side
135.36x = 23,348.74 - Step 5: Solve for x
x = 23,348.74/135.36 - Step 6: Final answer
x = 172.49
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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.