Finding the Fourth Proportional to 128,922.99, 177,910.94 and 71,558.96
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Solution
The fourth proportional to 128,922.99, 177,910.94 and 71,558.96 is: 98,749.81
Step by Step Solution
- Step 1: Write the proportion equation
128,922.99 : 177,910.94 = 71,558.96 : x - Step 2: Convert to fraction form
128,922.99/177,910.94 = 71,558.96/x - Step 3: Cross multiply
128,922.99x = 177,910.94 × 71,558.96 - Step 4: Simplify right side
128,922.99x = 12,731,120,591.67 - Step 5: Solve for x
x = 12,731,120,591.67/128,922.99 - Step 6: Final answer
x = 98,749.81
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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.