Finding the Fourth Proportional to 88.08, 121.74 and 76.44
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Solution
The fourth proportional to 88.08, 121.74 and 76.44 is: 105.65
Step by Step Solution
- Step 1: Write the proportion equation
88.08 : 121.74 = 76.44 : x - Step 2: Convert to fraction form
88.08/121.74 = 76.44/x - Step 3: Cross multiply
88.08x = 121.74 × 76.44 - Step 4: Simplify right side
88.08x = 9,305.81 - Step 5: Solve for x
x = 9,305.81/88.08 - Step 6: Final answer
x = 105.65
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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.