Finding the Fourth Proportional to 128,743,139.20, 193,338,657.60 and 68,276,963.20
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Solution
The fourth proportional to 128,743,139.20, 193,338,657.60 and 68,276,963.20 is: 102,534,212.64
Step by Step Solution
- Step 1: Write the proportion equation
128,743,139.20 : 193,338,657.60 = 68,276,963.20 : x - Step 2: Convert to fraction form
128,743,139.20/193,338,657.60 = 68,276,963.20/x - Step 3: Cross multiply
128,743,139.20x = 193,338,657.60 × 68,276,963.20 - Step 4: Simplify right side
128,743,139.20x = 13,200,576,410,092,600 - Step 5: Solve for x
x = 13,200,576,410,092,600/128,743,139.20 - Step 6: Final answer
x = 102,534,212.64
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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.