Finding the Fourth Proportional to 128,895.40, 193,343.10 and 76,277.80
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Solution
The fourth proportional to 128,895.40, 193,343.10 and 76,277.80 is: 114,416.70
Step by Step Solution
- Step 1: Write the proportion equation
128,895.40 : 193,343.10 = 76,277.80 : x - Step 2: Convert to fraction form
128,895.40/193,343.10 = 76,277.80/x - Step 3: Cross multiply
128,895.40x = 193,343.10 × 76,277.80 - Step 4: Simplify right side
128,895.40x = 14,747,786,313.18 - Step 5: Solve for x
x = 14,747,786,313.18/128,895.40 - Step 6: Final answer
x = 114,416.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.