Finding the Fourth Proportional to 128,889,011.26, 177,853,431.21 and 73,116,662.14
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Solution
The fourth proportional to 128,889,011.26, 177,853,431.21 and 73,116,662.14 is: 100,893,389.69
Step by Step Solution
- Step 1: Write the proportion equation
128,889,011.26 : 177,853,431.21 = 73,116,662.14 : x - Step 2: Convert to fraction form
128,889,011.26/177,853,431.21 = 73,116,662.14/x - Step 3: Cross multiply
128,889,011.26x = 177,853,431.21 × 73,116,662.14 - Step 4: Simplify right side
128,889,011.26x = 13,004,049,240,221,302 - Step 5: Solve for x
x = 13,004,049,240,221,302/128,889,011.26 - Step 6: Final answer
x = 100,893,389.69
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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.