Finding the Fourth Proportional to 128,561.99, 192,852.70 and 39,824.46
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Solution
The fourth proportional to 128,561.99, 192,852.70 and 39,824.46 is: 59,739.70
Step by Step Solution
- Step 1: Write the proportion equation
128,561.99 : 192,852.70 = 39,824.46 : x - Step 2: Convert to fraction form
128,561.99/192,852.70 = 39,824.46/x - Step 3: Cross multiply
128,561.99x = 192,852.70 × 39,824.46 - Step 4: Simplify right side
128,561.99x = 7,680,254,537.48 - Step 5: Solve for x
x = 7,680,254,537.48/128,561.99 - Step 6: Final answer
x = 59,739.70
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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.