Finding the Fourth Proportional to 81.29, 122.02 and 70.06
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Solution
The fourth proportional to 81.29, 122.02 and 70.06 is: 105.15
Step by Step Solution
- Step 1: Write the proportion equation
81.29 : 122.02 = 70.06 : x - Step 2: Convert to fraction form
81.29/122.02 = 70.06/x - Step 3: Cross multiply
81.29x = 122.02 × 70.06 - Step 4: Simplify right side
81.29x = 8,548.24 - Step 5: Solve for x
x = 8,548.24/81.29 - Step 6: Final answer
x = 105.15
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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.