Finding the Fourth Proportional to 128,397.84, 177,251.13 and 85,448.81
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Solution
The fourth proportional to 128,397.84, 177,251.13 and 85,448.81 is: 117,960.69
Step by Step Solution
- Step 1: Write the proportion equation
128,397.84 : 177,251.13 = 85,448.81 : x - Step 2: Convert to fraction form
128,397.84/177,251.13 = 85,448.81/x - Step 3: Cross multiply
128,397.84x = 177,251.13 × 85,448.81 - Step 4: Simplify right side
128,397.84x = 15,145,897,243.40 - Step 5: Solve for x
x = 15,145,897,243.40/128,397.84 - Step 6: Final answer
x = 117,960.69
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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.