Finding the Fourth Proportional to 128,203,670.80, 192,305,506.20 and 115,438,589.20
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Solution
The fourth proportional to 128,203,670.80, 192,305,506.20 and 115,438,589.20 is: 173,157,883.80
Step by Step Solution
- Step 1: Write the proportion equation
128,203,670.80 : 192,305,506.20 = 115,438,589.20 : x - Step 2: Convert to fraction form
128,203,670.80/192,305,506.20 = 115,438,589.20/x - Step 3: Cross multiply
128,203,670.80x = 192,305,506.20 × 115,438,589.20 - Step 4: Simplify right side
128,203,670.80x = 22,199,476,331,119,852 - Step 5: Solve for x
x = 22,199,476,331,119,852/128,203,670.80 - Step 6: Final answer
x = 173,157,883.80
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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.