Finding the Fourth Proportional to 135.51, 203.15 and 66.99
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Solution
The fourth proportional to 135.51, 203.15 and 66.99 is: 100.43
Step by Step Solution
- Step 1: Write the proportion equation
135.51 : 203.15 = 66.99 : x - Step 2: Convert to fraction form
135.51/203.15 = 66.99/x - Step 3: Cross multiply
135.51x = 203.15 × 66.99 - Step 4: Simplify right side
135.51x = 13,609.19 - Step 5: Solve for x
x = 13,609.19/135.51 - Step 6: Final answer
x = 100.43
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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.