Finding the Fourth Proportional to 128,306,116.80, 192,081,261.60 and 120,831,825.60
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Solution
The fourth proportional to 128,306,116.80, 192,081,261.60 and 120,831,825.60 is: 180,891,839.62
Step by Step Solution
- Step 1: Write the proportion equation
128,306,116.80 : 192,081,261.60 = 120,831,825.60 : x - Step 2: Convert to fraction form
128,306,116.80/192,081,261.60 = 120,831,825.60/x - Step 3: Cross multiply
128,306,116.80x = 192,081,261.60 × 120,831,825.60 - Step 4: Simplify right side
128,306,116.80x = 23,209,529,502,679,176 - Step 5: Solve for x
x = 23,209,529,502,679,176/128,306,116.80 - Step 6: Final answer
x = 180,891,839.62
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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.