Finding the Fourth Proportional to 96.72, 133.48 and 81.15
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Solution
The fourth proportional to 96.72, 133.48 and 81.15 is: 111.99
Step by Step Solution
- Step 1: Write the proportion equation
96.72 : 133.48 = 81.15 : x - Step 2: Convert to fraction form
96.72/133.48 = 81.15/x - Step 3: Cross multiply
96.72x = 133.48 × 81.15 - Step 4: Simplify right side
96.72x = 10,831.23 - Step 5: Solve for x
x = 10,831.23/96.72 - Step 6: Final answer
x = 111.99
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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.