Finding the Fourth Proportional to 98.65, 135.80 and 84.81
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Solution
The fourth proportional to 98.65, 135.80 and 84.81 is: 116.74
Step by Step Solution
- Step 1: Write the proportion equation
98.65 : 135.80 = 84.81 : x - Step 2: Convert to fraction form
98.65/135.80 = 84.81/x - Step 3: Cross multiply
98.65x = 135.80 × 84.81 - Step 4: Simplify right side
98.65x = 11,516.09 - Step 5: Solve for x
x = 11,516.09/98.65 - 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.