Finding the Fourth Proportional to 128,653.87, 177,320.68 and 85,556.33
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Solution
The fourth proportional to 128,653.87, 177,320.68 and 85,556.33 is: 117,920.32
Step by Step Solution
- Step 1: Write the proportion equation
128,653.87 : 177,320.68 = 85,556.33 : x - Step 2: Convert to fraction form
128,653.87/177,320.68 = 85,556.33/x - Step 3: Cross multiply
128,653.87x = 177,320.68 × 85,556.33 - Step 4: Simplify right side
128,653.87x = 15,170,905,727.30 - Step 5: Solve for x
x = 15,170,905,727.30/128,653.87 - Step 6: Final answer
x = 117,920.32
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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.