Finding the Fourth Proportional to 128,534.49, 177,360.98 and 71,945.87
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Solution
The fourth proportional to 128,534.49, 177,360.98 and 71,945.87 is: 99,275.99
Step by Step Solution
- Step 1: Write the proportion equation
128,534.49 : 177,360.98 = 71,945.87 : x - Step 2: Convert to fraction form
128,534.49/177,360.98 = 71,945.87/x - Step 3: Cross multiply
128,534.49x = 177,360.98 × 71,945.87 - Step 4: Simplify right side
128,534.49x = 12,760,388,763.62 - Step 5: Solve for x
x = 12,760,388,763.62/128,534.49 - Step 6: Final answer
x = 99,275.99
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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.