Finding the Fourth Proportional to 128,583.08, 177,465.67 and 76,896.80
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Solution
The fourth proportional to 128,583.08, 177,465.67 and 76,896.80 is: 106,130.15
Step by Step Solution
- Step 1: Write the proportion equation
128,583.08 : 177,465.67 = 76,896.80 : x - Step 2: Convert to fraction form
128,583.08/177,465.67 = 76,896.80/x - Step 3: Cross multiply
128,583.08x = 177,465.67 × 76,896.80 - Step 4: Simplify right side
128,583.08x = 13,646,541,053.29 - Step 5: Solve for x
x = 13,646,541,053.29/128,583.08 - Step 6: Final answer
x = 106,130.15
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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.