Finding the Fourth Proportional to 98.66, 136.08 and 63.65
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Solution
The fourth proportional to 98.66, 136.08 and 63.65 is: 87.79
Step by Step Solution
- Step 1: Write the proportion equation
98.66 : 136.08 = 63.65 : x - Step 2: Convert to fraction form
98.66/136.08 = 63.65/x - Step 3: Cross multiply
98.66x = 136.08 × 63.65 - Step 4: Simplify right side
98.66x = 8,660.81 - Step 5: Solve for x
x = 8,660.81/98.66 - Step 6: Final answer
x = 87.79
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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.