Finding the Fourth Proportional to 128,502.70, 192,763.80 and 39,765.18
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Solution
The fourth proportional to 128,502.70, 192,763.80 and 39,765.18 is: 59,650.79
Step by Step Solution
- Step 1: Write the proportion equation
128,502.70 : 192,763.80 = 39,765.18 : x - Step 2: Convert to fraction form
128,502.70/192,763.80 = 39,765.18/x - Step 3: Cross multiply
128,502.70x = 192,763.80 × 39,765.18 - Step 4: Simplify right side
128,502.70x = 7,665,287,204.48 - Step 5: Solve for x
x = 7,665,287,204.48/128,502.70 - Step 6: Final answer
x = 59,650.79
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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.