Finding the Fourth Proportional to 128,586.96, 177,440.64 and 71,220.48
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Solution
The fourth proportional to 128,586.96, 177,440.64 and 71,220.48 is: 98,279.08
Step by Step Solution
- Step 1: Write the proportion equation
128,586.96 : 177,440.64 = 71,220.48 : x - Step 2: Convert to fraction form
128,586.96/177,440.64 = 71,220.48/x - Step 3: Cross multiply
128,586.96x = 177,440.64 × 71,220.48 - Step 4: Simplify right side
128,586.96x = 12,637,407,552.31 - Step 5: Solve for x
x = 12,637,407,552.31/128,586.96 - Step 6: Final answer
x = 98,279.08
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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.