Finding the Fourth Proportional to 128,305,686.80, 192,080,616.60 and 120,831,395.60
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Solution
The fourth proportional to 128,305,686.80, 192,080,616.60 and 120,831,395.60 is: 180,891,194.70
Step by Step Solution
- Step 1: Write the proportion equation
128,305,686.80 : 192,080,616.60 = 120,831,395.60 : x - Step 2: Convert to fraction form
128,305,686.80/192,080,616.60 = 120,831,395.60/x - Step 3: Cross multiply
128,305,686.80x = 192,080,616.60 × 120,831,395.60 - Step 4: Simplify right side
128,305,686.80x = 23,209,368,971,486,524 - Step 5: Solve for x
x = 23,209,368,971,486,524/128,305,686.80 - Step 6: Final answer
x = 180,891,194.70
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.