Finding the Fourth Proportional to 128,472.96, 177,297.48 and 71,884.74
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Solution
The fourth proportional to 128,472.96, 177,297.48 and 71,884.74 is: 99,203.62
Step by Step Solution
- Step 1: Write the proportion equation
128,472.96 : 177,297.48 = 71,884.74 : x - Step 2: Convert to fraction form
128,472.96/177,297.48 = 71,884.74/x - Step 3: Cross multiply
128,472.96x = 177,297.48 × 71,884.74 - Step 4: Simplify right side
128,472.96x = 12,744,983,252.46 - Step 5: Solve for x
x = 12,744,983,252.46/128,472.96 - Step 6: Final answer
x = 99,203.62
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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.