Finding the Fourth Proportional to 138,320.75, 190,653.18 and 97,982.75
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Solution
The fourth proportional to 138,320.75, 190,653.18 and 97,982.75 is: 135,053.65
Step by Step Solution
- Step 1: Write the proportion equation
138,320.75 : 190,653.18 = 97,982.75 : x - Step 2: Convert to fraction form
138,320.75/190,653.18 = 97,982.75/x - Step 3: Cross multiply
138,320.75x = 190,653.18 × 97,982.75 - Step 4: Simplify right side
138,320.75x = 18,680,721,919.38 - Step 5: Solve for x
x = 18,680,721,919.38/138,320.75 - Step 6: Final answer
x = 135,053.65
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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.