Finding the Fourth Proportional to 98.44, 135.79 and 65.70
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Solution
The fourth proportional to 98.44, 135.79 and 65.70 is: 90.63
Step by Step Solution
- Step 1: Write the proportion equation
98.44 : 135.79 = 65.70 : x - Step 2: Convert to fraction form
98.44/135.79 = 65.70/x - Step 3: Cross multiply
98.44x = 135.79 × 65.70 - Step 4: Simplify right side
98.44x = 8,921.40 - Step 5: Solve for x
x = 8,921.40/98.44 - Step 6: Final answer
x = 90.63
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.