Finding the Fourth Proportional to 105.49, 145.50 and 88.09
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Solution
The fourth proportional to 105.49, 145.50 and 88.09 is: 121.50
Step by Step Solution
- Step 1: Write the proportion equation
105.49 : 145.50 = 88.09 : x - Step 2: Convert to fraction form
105.49/145.50 = 88.09/x - Step 3: Cross multiply
105.49x = 145.50 × 88.09 - Step 4: Simplify right side
105.49x = 12,817.10 - Step 5: Solve for x
x = 12,817.10/105.49 - Step 6: Final answer
x = 121.50
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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.