Finding the Fourth Proportional to 213,428.07, 294,668.15 and 136,980.09
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Solution
The fourth proportional to 213,428.07, 294,668.15 and 136,980.09 is: 189,120.71
Step by Step Solution
- Step 1: Write the proportion equation
213,428.07 : 294,668.15 = 136,980.09 : x - Step 2: Convert to fraction form
213,428.07/294,668.15 = 136,980.09/x - Step 3: Cross multiply
213,428.07x = 294,668.15 × 136,980.09 - Step 4: Simplify right side
213,428.07x = 40,363,669,022.23 - Step 5: Solve for x
x = 40,363,669,022.23/213,428.07 - Step 6: Final answer
x = 189,120.71
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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.