Finding the Fourth Proportional to 128,299.38, 177,057.01 and 71,709.30
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Solution
The fourth proportional to 128,299.38, 177,057.01 and 71,709.30 is: 98,960.99
Step by Step Solution
- Step 1: Write the proportion equation
128,299.38 : 177,057.01 = 71,709.30 : x - Step 2: Convert to fraction form
128,299.38/177,057.01 = 71,709.30/x - Step 3: Cross multiply
128,299.38x = 177,057.01 × 71,709.30 - Step 4: Simplify right side
128,299.38x = 12,696,634,247.19 - Step 5: Solve for x
x = 12,696,634,247.19/128,299.38 - Step 6: Final answer
x = 98,960.99
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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.