Finding the Fourth Proportional to 128,088.63, 176,759.28 and 74,372.13
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Solution
The fourth proportional to 128,088.63, 176,759.28 and 74,372.13 is: 102,631.78
Step by Step Solution
- Step 1: Write the proportion equation
128,088.63 : 176,759.28 = 74,372.13 : x - Step 2: Convert to fraction form
128,088.63/176,759.28 = 74,372.13/x - Step 3: Cross multiply
128,088.63x = 176,759.28 × 74,372.13 - Step 4: Simplify right side
128,088.63x = 13,145,964,150.87 - Step 5: Solve for x
x = 13,145,964,150.87/128,088.63 - Step 6: Final answer
x = 102,631.78
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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.