Finding the Fourth Proportional to 153,863.63, 212,336.18 and 85,879.19
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Solution
The fourth proportional to 153,863.63, 212,336.18 and 85,879.19 is: 118,515.72
Step by Step Solution
- Step 1: Write the proportion equation
153,863.63 : 212,336.18 = 85,879.19 : x - Step 2: Convert to fraction form
153,863.63/212,336.18 = 85,879.19/x - Step 3: Cross multiply
153,863.63x = 212,336.18 × 85,879.19 - Step 4: Simplify right side
153,863.63x = 18,235,259,146.09 - Step 5: Solve for x
x = 18,235,259,146.09/153,863.63 - Step 6: Final answer
x = 118,515.72
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.