Finding the Fourth Proportional to 61.16, 91.62 and 55.40
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Solution
The fourth proportional to 61.16, 91.62 and 55.40 is: 82.99
Step by Step Solution
- Step 1: Write the proportion equation
61.16 : 91.62 = 55.40 : x - Step 2: Convert to fraction form
61.16/91.62 = 55.40/x - Step 3: Cross multiply
61.16x = 91.62 × 55.40 - Step 4: Simplify right side
61.16x = 5,075.75 - Step 5: Solve for x
x = 5,075.75/61.16 - Step 6: Final answer
x = 82.99
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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.