Finding the Fourth Proportional to 70.10, 105.18 and 47.31
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Solution
The fourth proportional to 70.10, 105.18 and 47.31 is: 70.99
Step by Step Solution
- Step 1: Write the proportion equation
70.10 : 105.18 = 47.31 : x - Step 2: Convert to fraction form
70.10/105.18 = 47.31/x - Step 3: Cross multiply
70.10x = 105.18 × 47.31 - Step 4: Simplify right side
70.10x = 4,976.07 - Step 5: Solve for x
x = 4,976.07/70.10 - Step 6: Final answer
x = 70.99
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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.