Finding the Fourth Proportional to 84,142.60, 126,176.97 and 31,515.18
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Solution
The fourth proportional to 84,142.60, 126,176.97 and 31,515.18 is: 47,258.94
Step by Step Solution
- Step 1: Write the proportion equation
84,142.60 : 126,176.97 = 31,515.18 : x - Step 2: Convert to fraction form
84,142.60/126,176.97 = 31,515.18/x - Step 3: Cross multiply
84,142.60x = 126,176.97 × 31,515.18 - Step 4: Simplify right side
84,142.60x = 3,976,489,921.40 - Step 5: Solve for x
x = 3,976,489,921.40/84,142.60 - Step 6: Final answer
x = 47,258.94
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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.