Finding the Fourth Proportional to 128,511.04, 177,338.28 and 71,911.48
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Solution
The fourth proportional to 128,511.04, 177,338.28 and 71,911.48 is: 99,233.95
Step by Step Solution
- Step 1: Write the proportion equation
128,511.04 : 177,338.28 = 71,911.48 : x - Step 2: Convert to fraction form
128,511.04/177,338.28 = 71,911.48/x - Step 3: Cross multiply
128,511.04x = 177,338.28 × 71,911.48 - Step 4: Simplify right side
128,511.04x = 12,752,658,175.45 - Step 5: Solve for x
x = 12,752,658,175.45/128,511.04 - Step 6: Final answer
x = 99,233.95
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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.