Finding the Fourth Proportional to 138,281.60, 206,961.60 and 121,692.80
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Solution
The fourth proportional to 138,281.60, 206,961.60 and 121,692.80 is: 182,133.68
Step by Step Solution
- Step 1: Write the proportion equation
138,281.60 : 206,961.60 = 121,692.80 : x - Step 2: Convert to fraction form
138,281.60/206,961.60 = 121,692.80/x - Step 3: Cross multiply
138,281.60x = 206,961.60 × 121,692.80 - Step 4: Simplify right side
138,281.60x = 25,185,736,596.48 - Step 5: Solve for x
x = 25,185,736,596.48/138,281.60 - Step 6: Final answer
x = 182,133.68
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.