Finding the Fourth Proportional to 128,882.99, 177,858.14 and 71,530.97
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Solution
The fourth proportional to 128,882.99, 177,858.14 and 71,530.97 is: 98,712.51
Step by Step Solution
- Step 1: Write the proportion equation
128,882.99 : 177,858.14 = 71,530.97 : x - Step 2: Convert to fraction form
128,882.99/177,858.14 = 71,530.97/x - Step 3: Cross multiply
128,882.99x = 177,858.14 × 71,530.97 - Step 4: Simplify right side
128,882.99x = 12,722,364,029.65 - Step 5: Solve for x
x = 12,722,364,029.65/128,882.99 - Step 6: Final answer
x = 98,712.51
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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.