Finding the Fourth Proportional to 128,908.13, 177,890.49 and 71,544.11
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Solution
The fourth proportional to 128,908.13, 177,890.49 and 71,544.11 is: 98,729.35
Step by Step Solution
- Step 1: Write the proportion equation
128,908.13 : 177,890.49 = 71,544.11 : x - Step 2: Convert to fraction form
128,908.13/177,890.49 = 71,544.11/x - Step 3: Cross multiply
128,908.13x = 177,890.49 × 71,544.11 - Step 4: Simplify right side
128,908.13x = 12,727,015,895.06 - Step 5: Solve for x
x = 12,727,015,895.06/128,908.13 - Step 6: Final answer
x = 98,729.35
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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.