Finding the Fourth Proportional to 256,519,807.20, 353,987,850.24 and 139,042,615.23
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Solution
The fourth proportional to 256,519,807.20, 353,987,850.24 and 139,042,615.23 is: 191,873,668.53
Step by Step Solution
- Step 1: Write the proportion equation
256,519,807.20 : 353,987,850.24 = 139,042,615.23 : x - Step 2: Convert to fraction form
256,519,807.20/353,987,850.24 = 139,042,615.23/x - Step 3: Cross multiply
256,519,807.20x = 353,987,850.24 × 139,042,615.23 - Step 4: Simplify right side
256,519,807.20x = 49,219,396,457,015,184 - Step 5: Solve for x
x = 49,219,396,457,015,184/256,519,807.20 - Step 6: Final answer
x = 191,873,668.53
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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.