Finding the Fourth Proportional to 128,916.96, 193,195.60 and 69,624.96
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Solution
The fourth proportional to 128,916.96, 193,195.60 and 69,624.96 is: 104,340.31
Step by Step Solution
- Step 1: Write the proportion equation
128,916.96 : 193,195.60 = 69,624.96 : x - Step 2: Convert to fraction form
128,916.96/193,195.60 = 69,624.96/x - Step 3: Cross multiply
128,916.96x = 193,195.60 × 69,624.96 - Step 4: Simplify right side
128,916.96x = 13,451,235,922.18 - Step 5: Solve for x
x = 13,451,235,922.18/128,916.96 - Step 6: Final answer
x = 104,340.31
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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.