Finding the Fourth Proportional to 128,458.81, 177,271.84 and 71,098.26
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Solution
The fourth proportional to 128,458.81, 177,271.84 and 71,098.26 is: 98,114.86
Step by Step Solution
- Step 1: Write the proportion equation
128,458.81 : 177,271.84 = 71,098.26 : x - Step 2: Convert to fraction form
128,458.81/177,271.84 = 71,098.26/x - Step 3: Cross multiply
128,458.81x = 177,271.84 × 71,098.26 - Step 4: Simplify right side
128,458.81x = 12,603,718,795.10 - Step 5: Solve for x
x = 12,603,718,795.10/128,458.81 - Step 6: Final answer
x = 98,114.86
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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.