Finding the Fourth Proportional to 128,771.30, 177,703.84 and 72,182.68
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Solution
The fourth proportional to 128,771.30, 177,703.84 and 72,182.68 is: 99,611.79
Step by Step Solution
- Step 1: Write the proportion equation
128,771.30 : 177,703.84 = 72,182.68 : x - Step 2: Convert to fraction form
128,771.30/177,703.84 = 72,182.68/x - Step 3: Cross multiply
128,771.30x = 177,703.84 × 72,182.68 - Step 4: Simplify right side
128,771.30x = 12,827,139,417.49 - Step 5: Solve for x
x = 12,827,139,417.49/128,771.30 - Step 6: Final answer
x = 99,611.79
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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.