Finding the Fourth Proportional to 128,344.29, 177,137.01 and 74,660.46
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Solution
The fourth proportional to 128,344.29, 177,137.01 and 74,660.46 is: 103,044.17
Step by Step Solution
- Step 1: Write the proportion equation
128,344.29 : 177,137.01 = 74,660.46 : x - Step 2: Convert to fraction form
128,344.29/177,137.01 = 74,660.46/x - Step 3: Cross multiply
128,344.29x = 177,137.01 × 74,660.46 - Step 4: Simplify right side
128,344.29x = 13,225,130,649.62 - Step 5: Solve for x
x = 13,225,130,649.62/128,344.29 - Step 6: Final answer
x = 103,044.17
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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.