Finding the Fourth Proportional to 128,185.92, 176,960.16 and 97,721.28
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Solution
The fourth proportional to 128,185.92, 176,960.16 and 97,721.28 is: 134,903.84
Step by Step Solution
- Step 1: Write the proportion equation
128,185.92 : 176,960.16 = 97,721.28 : x - Step 2: Convert to fraction form
128,185.92/176,960.16 = 97,721.28/x - Step 3: Cross multiply
128,185.92x = 176,960.16 × 97,721.28 - Step 4: Simplify right side
128,185.92x = 17,292,773,344.20 - Step 5: Solve for x
x = 17,292,773,344.20/128,185.92 - Step 6: Final answer
x = 134,903.84
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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.