Finding the Fourth Proportional to 70.45, 105.60 and 46.09
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Solution
The fourth proportional to 70.45, 105.60 and 46.09 is: 69.09
Step by Step Solution
- Step 1: Write the proportion equation
70.45 : 105.60 = 46.09 : x - Step 2: Convert to fraction form
70.45/105.60 = 46.09/x - Step 3: Cross multiply
70.45x = 105.60 × 46.09 - Step 4: Simplify right side
70.45x = 4,867.10 - Step 5: Solve for x
x = 4,867.10/70.45 - Step 6: Final answer
x = 69.09
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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.