Finding the Fourth Proportional to 98.69, 135.99 and 69.53
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Solution
The fourth proportional to 98.69, 135.99 and 69.53 is: 95.81
Step by Step Solution
- Step 1: Write the proportion equation
98.69 : 135.99 = 69.53 : x - Step 2: Convert to fraction form
98.69/135.99 = 69.53/x - Step 3: Cross multiply
98.69x = 135.99 × 69.53 - Step 4: Simplify right side
98.69x = 9,454.70 - Step 5: Solve for x
x = 9,454.70/98.69 - Step 6: Final answer
x = 95.81
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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.