Finding the Fourth Proportional to 126,721.92, 174,885.12 and 70,135.68
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Solution
The fourth proportional to 126,721.92, 174,885.12 and 70,135.68 is: 96,792.15
Step by Step Solution
- Step 1: Write the proportion equation
126,721.92 : 174,885.12 = 70,135.68 : x - Step 2: Convert to fraction form
126,721.92/174,885.12 = 70,135.68/x - Step 3: Cross multiply
126,721.92x = 174,885.12 × 70,135.68 - Step 4: Simplify right side
126,721.92x = 12,265,686,813.08 - Step 5: Solve for x
x = 12,265,686,813.08/126,721.92 - Step 6: Final answer
x = 96,792.15
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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.