Finding the Fourth Proportional to 128,479.00, 177,298.88 and 71,117.09
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Solution
The fourth proportional to 128,479.00, 177,298.88 and 71,117.09 is: 98,140.40
Step by Step Solution
- Step 1: Write the proportion equation
128,479.00 : 177,298.88 = 71,117.09 : x - Step 2: Convert to fraction form
128,479.00/177,298.88 = 71,117.09/x - Step 3: Cross multiply
128,479.00x = 177,298.88 × 71,117.09 - Step 4: Simplify right side
128,479.00x = 12,608,981,025.97 - Step 5: Solve for x
x = 12,608,981,025.97/128,479.00 - Step 6: Final answer
x = 98,140.40
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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.