Finding the Fourth Proportional to 98.62, 135.93 and 84.70
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Solution
The fourth proportional to 98.62, 135.93 and 84.70 is: 116.74
Step by Step Solution
- Step 1: Write the proportion equation
98.62 : 135.93 = 84.70 : x - Step 2: Convert to fraction form
98.62/135.93 = 84.70/x - Step 3: Cross multiply
98.62x = 135.93 × 84.70 - Step 4: Simplify right side
98.62x = 11,513.27 - Step 5: Solve for x
x = 11,513.27/98.62 - Step 6: Final answer
x = 116.74
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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.