Finding the Fourth Proportional to 88.74, 122.58 and 76.68
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Solution
The fourth proportional to 88.74, 122.58 and 76.68 is: 105.92
Step by Step Solution
- Step 1: Write the proportion equation
88.74 : 122.58 = 76.68 : x - Step 2: Convert to fraction form
88.74/122.58 = 76.68/x - Step 3: Cross multiply
88.74x = 122.58 × 76.68 - Step 4: Simplify right side
88.74x = 9,399.43 - Step 5: Solve for x
x = 9,399.43/88.74 - Step 6: Final answer
x = 105.92
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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.