Finding the Fourth Proportional to 98.41, 135.67 and 84.74
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Solution
The fourth proportional to 98.41, 135.67 and 84.74 is: 116.82
Step by Step Solution
- Step 1: Write the proportion equation
98.41 : 135.67 = 84.74 : x - Step 2: Convert to fraction form
98.41/135.67 = 84.74/x - Step 3: Cross multiply
98.41x = 135.67 × 84.74 - Step 4: Simplify right side
98.41x = 11,495.79 - Step 5: Solve for x
x = 11,495.79/98.41 - Step 6: Final answer
x = 116.82
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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.