Finding the Fourth Proportional to 135.31, 202.97 and 66.88
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Solution
The fourth proportional to 135.31, 202.97 and 66.88 is: 100.32
Step by Step Solution
- Step 1: Write the proportion equation
135.31 : 202.97 = 66.88 : x - Step 2: Convert to fraction form
135.31/202.97 = 66.88/x - Step 3: Cross multiply
135.31x = 202.97 × 66.88 - Step 4: Simplify right side
135.31x = 13,574.63 - Step 5: Solve for x
x = 13,574.63/135.31 - Step 6: Final answer
x = 100.32
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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.