Finding the Fourth Proportional to 138,160.13, 190,660.97 and 78,544.13
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Solution
The fourth proportional to 138,160.13, 190,660.97 and 78,544.13 is: 108,390.89
Step by Step Solution
- Step 1: Write the proportion equation
138,160.13 : 190,660.97 = 78,544.13 : x - Step 2: Convert to fraction form
138,160.13/190,660.97 = 78,544.13/x - Step 3: Cross multiply
138,160.13x = 190,660.97 × 78,544.13 - Step 4: Simplify right side
138,160.13x = 14,975,299,256.66 - Step 5: Solve for x
x = 14,975,299,256.66/138,160.13 - Step 6: Final answer
x = 108,390.89
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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.