Finding the Fourth Proportional to 81.07, 121.62 and 26.95
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Solution
The fourth proportional to 81.07, 121.62 and 26.95 is: 40.43
Step by Step Solution
- Step 1: Write the proportion equation
81.07 : 121.62 = 26.95 : x - Step 2: Convert to fraction form
81.07/121.62 = 26.95/x - Step 3: Cross multiply
81.07x = 121.62 × 26.95 - Step 4: Simplify right side
81.07x = 3,277.66 - Step 5: Solve for x
x = 3,277.66/81.07 - Step 6: Final answer
x = 40.43
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.