Finding the Fourth Proportional to 128,584.08, 177,467.05 and 76,897.80
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Solution
The fourth proportional to 128,584.08, 177,467.05 and 76,897.80 is: 106,131.53
Step by Step Solution
- Step 1: Write the proportion equation
128,584.08 : 177,467.05 = 76,897.80 : x - Step 2: Convert to fraction form
128,584.08/177,467.05 = 76,897.80/x - Step 3: Cross multiply
128,584.08x = 177,467.05 × 76,897.80 - Step 4: Simplify right side
128,584.08x = 13,646,825,717.49 - Step 5: Solve for x
x = 13,646,825,717.49/128,584.08 - Step 6: Final answer
x = 106,131.53
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1.5x scale
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.