Finding the Fourth Proportional to 135.18, 202.68 and 66.64
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Solution
The fourth proportional to 135.18, 202.68 and 66.64 is: 99.92
Step by Step Solution
- Step 1: Write the proportion equation
135.18 : 202.68 = 66.64 : x - Step 2: Convert to fraction form
135.18/202.68 = 66.64/x - Step 3: Cross multiply
135.18x = 202.68 × 66.64 - Step 4: Simplify right side
135.18x = 13,506.60 - Step 5: Solve for x
x = 13,506.60/135.18 - Step 6: Final answer
x = 99.92
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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.