Finding the Fourth Proportional to 128,614.13, 177,478.93 and 71,249.59
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Solution
The fourth proportional to 128,614.13, 177,478.93 and 71,249.59 is: 98,319.69
Step by Step Solution
- Step 1: Write the proportion equation
128,614.13 : 177,478.93 = 71,249.59 : x - Step 2: Convert to fraction form
128,614.13/177,478.93 = 71,249.59/x - Step 3: Cross multiply
128,614.13x = 177,478.93 × 71,249.59 - Step 4: Simplify right side
128,614.13x = 12,645,300,996.14 - Step 5: Solve for x
x = 12,645,300,996.14/128,614.13 - Step 6: Final answer
x = 98,319.69
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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.