Finding the Fourth Proportional to 128,857.66, 193,249.42 and 53,975.99
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Solution
The fourth proportional to 128,857.66, 193,249.42 and 53,975.99 is: 80,948.46
Step by Step Solution
- Step 1: Write the proportion equation
128,857.66 : 193,249.42 = 53,975.99 : x - Step 2: Convert to fraction form
128,857.66/193,249.42 = 53,975.99/x - Step 3: Cross multiply
128,857.66x = 193,249.42 × 53,975.99 - Step 4: Simplify right side
128,857.66x = 10,430,829,109.61 - Step 5: Solve for x
x = 10,430,829,109.61/128,857.66 - Step 6: Final answer
x = 80,948.46
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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.