Finding the Fourth Proportional to 61.22, 84.63 and 57.14
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Solution
The fourth proportional to 61.22, 84.63 and 57.14 is: 78.99
Step by Step Solution
- Step 1: Write the proportion equation
61.22 : 84.63 = 57.14 : x - Step 2: Convert to fraction form
61.22/84.63 = 57.14/x - Step 3: Cross multiply
61.22x = 84.63 × 57.14 - Step 4: Simplify right side
61.22x = 4,835.76 - Step 5: Solve for x
x = 4,835.76/61.22 - Step 6: Final answer
x = 78.99
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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.