Finding the Fourth Proportional to 128,911.60, 193,169.61 and 53,990.75
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Solution
The fourth proportional to 128,911.60, 193,169.61 and 53,990.75 is: 80,903.29
Step by Step Solution
- Step 1: Write the proportion equation
128,911.60 : 193,169.61 = 53,990.75 : x - Step 2: Convert to fraction form
128,911.60/193,169.61 = 53,990.75/x - Step 3: Cross multiply
128,911.60x = 193,169.61 × 53,990.75 - Step 4: Simplify right side
128,911.60x = 10,429,372,604.03 - Step 5: Solve for x
x = 10,429,372,604.03/128,911.60 - Step 6: Final answer
x = 80,903.29
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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.