Finding the Fourth Proportional to 128,511.58, 177,345.96 and 71,922.96
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Solution
The fourth proportional to 128,511.58, 177,345.96 and 71,922.96 is: 99,253.66
Step by Step Solution
- Step 1: Write the proportion equation
128,511.58 : 177,345.96 = 71,922.96 : x - Step 2: Convert to fraction form
128,511.58/177,345.96 = 71,922.96/x - Step 3: Cross multiply
128,511.58x = 177,345.96 × 71,922.96 - Step 4: Simplify right side
128,511.58x = 12,755,245,140.90 - Step 5: Solve for x
x = 12,755,245,140.90/128,511.58 - Step 6: Final answer
x = 99,253.66
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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.