Finding the Fourth Proportional to 128,051.68, 176,689.12 and 74,324.64
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Solution
The fourth proportional to 128,051.68, 176,689.12 and 74,324.64 is: 102,555.12
Step by Step Solution
- Step 1: Write the proportion equation
128,051.68 : 176,689.12 = 74,324.64 : x - Step 2: Convert to fraction form
128,051.68/176,689.12 = 74,324.64/x - Step 3: Cross multiply
128,051.68x = 176,689.12 × 74,324.64 - Step 4: Simplify right side
128,051.68x = 13,132,355,235.92 - Step 5: Solve for x
x = 13,132,355,235.92/128,051.68 - Step 6: Final answer
x = 102,555.12
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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.