Finding the Fourth Proportional to 128,129.80, 192,194.70 and 49,246.60
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Solution
The fourth proportional to 128,129.80, 192,194.70 and 49,246.60 is: 73,869.90
Step by Step Solution
- Step 1: Write the proportion equation
128,129.80 : 192,194.70 = 49,246.60 : x - Step 2: Convert to fraction form
128,129.80/192,194.70 = 49,246.60/x - Step 3: Cross multiply
128,129.80x = 192,194.70 × 49,246.60 - Step 4: Simplify right side
128,129.80x = 9,464,935,513.02 - Step 5: Solve for x
x = 9,464,935,513.02/128,129.80 - Step 6: Final answer
x = 73,869.90
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Double scale
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Similar ratio
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1.5x scale
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.