Finding the Fourth Proportional to 128,548.23, 177,735.21 and 112,586.99
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Solution
The fourth proportional to 128,548.23, 177,735.21 and 112,586.99 is: 155,666.64
Step by Step Solution
- Step 1: Write the proportion equation
128,548.23 : 177,735.21 = 112,586.99 : x - Step 2: Convert to fraction form
128,548.23/177,735.21 = 112,586.99/x - Step 3: Cross multiply
128,548.23x = 177,735.21 × 112,586.99 - Step 4: Simplify right side
128,548.23x = 20,010,671,422.24 - Step 5: Solve for x
x = 20,010,671,422.24/128,548.23 - Step 6: Final answer
x = 155,666.64
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.