Finding the Fourth Proportional to 191,105.80, 286,658.70 and 86,129.80
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Solution
The fourth proportional to 191,105.80, 286,658.70 and 86,129.80 is: 129,194.70
Step by Step Solution
- Step 1: Write the proportion equation
191,105.80 : 286,658.70 = 86,129.80 : x - Step 2: Convert to fraction form
191,105.80/286,658.70 = 86,129.80/x - Step 3: Cross multiply
191,105.80x = 286,658.70 × 86,129.80 - Step 4: Simplify right side
191,105.80x = 24,689,856,499.26 - Step 5: Solve for x
x = 24,689,856,499.26/191,105.80 - Step 6: Final answer
x = 129,194.70
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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.