Finding the Fourth Proportional to 98.46, 135.84 and 79.08
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Solution
The fourth proportional to 98.46, 135.84 and 79.08 is: 109.10
Step by Step Solution
- Step 1: Write the proportion equation
98.46 : 135.84 = 79.08 : x - Step 2: Convert to fraction form
98.46/135.84 = 79.08/x - Step 3: Cross multiply
98.46x = 135.84 × 79.08 - Step 4: Simplify right side
98.46x = 10,742.23 - Step 5: Solve for x
x = 10,742.23/98.46 - Step 6: Final answer
x = 109.10
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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.