Finding the Fourth Proportional to 128,281.05, 177,028.11 and 71,692.43
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Solution
The fourth proportional to 128,281.05, 177,028.11 and 71,692.43 is: 98,935.69
Step by Step Solution
- Step 1: Write the proportion equation
128,281.05 : 177,028.11 = 71,692.43 : x - Step 2: Convert to fraction form
128,281.05/177,028.11 = 71,692.43/x - Step 3: Cross multiply
128,281.05x = 177,028.11 × 71,692.43 - Step 4: Simplify right side
128,281.05x = 12,691,574,499.07 - Step 5: Solve for x
x = 12,691,574,499.07/128,281.05 - Step 6: Final answer
x = 98,935.69
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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.