Finding the Fourth Proportional to 86,543.24, 129,814.86 and 31,137.80
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Solution
The fourth proportional to 86,543.24, 129,814.86 and 31,137.80 is: 46,706.70
Step by Step Solution
- Step 1: Write the proportion equation
86,543.24 : 129,814.86 = 31,137.80 : x - Step 2: Convert to fraction form
86,543.24/129,814.86 = 31,137.80/x - Step 3: Cross multiply
86,543.24x = 129,814.86 × 31,137.80 - Step 4: Simplify right side
86,543.24x = 4,042,149,147.71 - Step 5: Solve for x
x = 4,042,149,147.71/86,543.24 - Step 6: Final answer
x = 46,706.70
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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.