Finding the Fourth Proportional to 128,515.48, 192,782.96 and 39,777.96
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Solution
The fourth proportional to 128,515.48, 192,782.96 and 39,777.96 is: 59,669.95
Step by Step Solution
- Step 1: Write the proportion equation
128,515.48 : 192,782.96 = 39,777.96 : x - Step 2: Convert to fraction form
128,515.48/192,782.96 = 39,777.96/x - Step 3: Cross multiply
128,515.48x = 192,782.96 × 39,777.96 - Step 4: Simplify right side
128,515.48x = 7,668,512,871.56 - Step 5: Solve for x
x = 7,668,512,871.56/128,515.48 - Step 6: Final answer
x = 59,669.95
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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.