Finding the Fourth Proportional to 73,142.09, 100,935.50 and 39,608.09
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Solution
The fourth proportional to 73,142.09, 100,935.50 and 39,608.09 is: 54,658.85
Step by Step Solution
- Step 1: Write the proportion equation
73,142.09 : 100,935.50 = 39,608.09 : x - Step 2: Convert to fraction form
73,142.09/100,935.50 = 39,608.09/x - Step 3: Cross multiply
73,142.09x = 100,935.50 × 39,608.09 - Step 4: Simplify right side
73,142.09x = 3,997,862,368.20 - Step 5: Solve for x
x = 3,997,862,368.20/73,142.09 - Step 6: Final answer
x = 54,658.85
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1.5x scale
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.