Finding the Fourth Proportional to 88.39, 122.11 and 76.09
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Solution
The fourth proportional to 88.39, 122.11 and 76.09 is: 105.11
Step by Step Solution
- Step 1: Write the proportion equation
88.39 : 122.11 = 76.09 : x - Step 2: Convert to fraction form
88.39/122.11 = 76.09/x - Step 3: Cross multiply
88.39x = 122.11 × 76.09 - Step 4: Simplify right side
88.39x = 9,291.08 - Step 5: Solve for x
x = 9,291.08/88.39 - Step 6: Final answer
x = 105.11
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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.