Finding the Fourth Proportional to 39,128,786.49, 53,996,697.90 and 21,724,684.23
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Solution
The fourth proportional to 39,128,786.49, 53,996,697.90 and 21,724,684.23 is: 29,979,493.78
Step by Step Solution
- Step 1: Write the proportion equation
39,128,786.49 : 53,996,697.90 = 21,724,684.23 : x - Step 2: Convert to fraction form
39,128,786.49/53,996,697.90 = 21,724,684.23/x - Step 3: Cross multiply
39,128,786.49x = 53,996,697.90 × 21,724,684.23 - Step 4: Simplify right side
39,128,786.49x = 1,173,061,211,340,204 - Step 5: Solve for x
x = 1,173,061,211,340,204/39,128,786.49 - Step 6: Final answer
x = 29,979,493.78
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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.