Finding the Fourth Proportional to 70,286.86, 105,430.29 and 20,366.99
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Solution
The fourth proportional to 70,286.86, 105,430.29 and 20,366.99 is: 30,550.49
Step by Step Solution
- Step 1: Write the proportion equation
70,286.86 : 105,430.29 = 20,366.99 : x - Step 2: Convert to fraction form
70,286.86/105,430.29 = 20,366.99/x - Step 3: Cross multiply
70,286.86x = 105,430.29 × 20,366.99 - Step 4: Simplify right side
70,286.86x = 2,147,297,662.13 - Step 5: Solve for x
x = 2,147,297,662.13/70,286.86 - Step 6: Final answer
x = 30,550.49
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1.5x scale
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.