Finding the Fourth Proportional to 128,280.80, 177,027.77 and 71,692.18
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Solution
The fourth proportional to 128,280.80, 177,027.77 and 71,692.18 is: 98,935.35
Step by Step Solution
- Step 1: Write the proportion equation
128,280.80 : 177,027.77 = 71,692.18 : x - Step 2: Convert to fraction form
128,280.80/177,027.77 = 71,692.18/x - Step 3: Cross multiply
128,280.80x = 177,027.77 × 71,692.18 - Step 4: Simplify right side
128,280.80x = 12,691,505,508.24 - Step 5: Solve for x
x = 12,691,505,508.24/128,280.80 - Step 6: Final answer
x = 98,935.35
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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.