Finding the Fourth Proportional to 128,203,816.80, 192,305,725.20 and 115,438,735.20
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Solution
The fourth proportional to 128,203,816.80, 192,305,725.20 and 115,438,735.20 is: 173,158,102.80
Step by Step Solution
- Step 1: Write the proportion equation
128,203,816.80 : 192,305,725.20 = 115,438,735.20 : x - Step 2: Convert to fraction form
128,203,816.80/192,305,725.20 = 115,438,735.20/x - Step 3: Cross multiply
128,203,816.80x = 192,305,725.20 × 115,438,735.20 - Step 4: Simplify right side
128,203,816.80x = 22,199,529,688,806,768 - Step 5: Solve for x
x = 22,199,529,688,806,768/128,203,816.80 - Step 6: Final answer
x = 173,158,102.80
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1.5x scale
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.