Finding the Fourth Proportional to 88.98, 122.14 and 81.68
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Solution
The fourth proportional to 88.98, 122.14 and 81.68 is: 112.12
Step by Step Solution
- Step 1: Write the proportion equation
88.98 : 122.14 = 81.68 : x - Step 2: Convert to fraction form
88.98/122.14 = 81.68/x - Step 3: Cross multiply
88.98x = 122.14 × 81.68 - Step 4: Simplify right side
88.98x = 9,976.40 - Step 5: Solve for x
x = 9,976.40/88.98 - Step 6: Final answer
x = 112.12
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.