Finding the Fourth Proportional to 61.72, 92.39 and 47.99
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Solution
The fourth proportional to 61.72, 92.39 and 47.99 is: 71.84
Step by Step Solution
- Step 1: Write the proportion equation
61.72 : 92.39 = 47.99 : x - Step 2: Convert to fraction form
61.72/92.39 = 47.99/x - Step 3: Cross multiply
61.72x = 92.39 × 47.99 - Step 4: Simplify right side
61.72x = 4,433.80 - Step 5: Solve for x
x = 4,433.80/61.72 - Step 6: Final answer
x = 71.84
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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.