Finding the Fourth Proportional to 84.24, 125.61 and 81.03
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Solution
The fourth proportional to 84.24, 125.61 and 81.03 is: 120.82
Step by Step Solution
- Step 1: Write the proportion equation
84.24 : 125.61 = 81.03 : x - Step 2: Convert to fraction form
84.24/125.61 = 81.03/x - Step 3: Cross multiply
84.24x = 125.61 × 81.03 - Step 4: Simplify right side
84.24x = 10,178.18 - Step 5: Solve for x
x = 10,178.18/84.24 - Step 6: Final answer
x = 120.82
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.