Finding the Fourth Proportional to 128,442.62, 177,245.96 and 71,853.96
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Solution
The fourth proportional to 128,442.62, 177,245.96 and 71,853.96 is: 99,155.75
Step by Step Solution
- Step 1: Write the proportion equation
128,442.62 : 177,245.96 = 71,853.96 : x - Step 2: Convert to fraction form
128,442.62/177,245.96 = 71,853.96/x - Step 3: Cross multiply
128,442.62x = 177,245.96 × 71,853.96 - Step 4: Simplify right side
128,442.62x = 12,735,824,120.00 - Step 5: Solve for x
x = 12,735,824,120.00/128,442.62 - Step 6: Final answer
x = 99,155.75
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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.