Finding the Fourth Proportional to 128,231.24, 177,008.49 and 114,778.76
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Solution
The fourth proportional to 128,231.24, 177,008.49 and 114,778.76 is: 158,438.89
Step by Step Solution
- Step 1: Write the proportion equation
128,231.24 : 177,008.49 = 114,778.76 : x - Step 2: Convert to fraction form
128,231.24/177,008.49 = 114,778.76/x - Step 3: Cross multiply
128,231.24x = 177,008.49 × 114,778.76 - Step 4: Simplify right side
128,231.24x = 20,316,814,106.63 - Step 5: Solve for x
x = 20,316,814,106.63/128,231.24 - Step 6: Final answer
x = 158,438.89
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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.