Finding the Fourth Proportional to 61.66, 91.73 and 61.09
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Solution
The fourth proportional to 61.66, 91.73 and 61.09 is: 90.88
Step by Step Solution
- Step 1: Write the proportion equation
61.66 : 91.73 = 61.09 : x - Step 2: Convert to fraction form
61.66/91.73 = 61.09/x - Step 3: Cross multiply
61.66x = 91.73 × 61.09 - Step 4: Simplify right side
61.66x = 5,603.79 - Step 5: Solve for x
x = 5,603.79/61.66 - Step 6: Final answer
x = 90.88
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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.