Finding the Fourth Proportional to 128,448.38, 192,701.84 and 69,282.74
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Solution
The fourth proportional to 128,448.38, 192,701.84 and 69,282.74 is: 103,939.90
Step by Step Solution
- Step 1: Write the proportion equation
128,448.38 : 192,701.84 = 69,282.74 : x - Step 2: Convert to fraction form
128,448.38/192,701.84 = 69,282.74/x - Step 3: Cross multiply
128,448.38x = 192,701.84 × 69,282.74 - Step 4: Simplify right side
128,448.38x = 13,350,911,613.58 - Step 5: Solve for x
x = 13,350,911,613.58/128,448.38 - Step 6: Final answer
x = 103,939.90
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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.