Finding the Fourth Proportional to 128,876.13, 177,848.82 and 71,524.26
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Solution
The fourth proportional to 128,876.13, 177,848.82 and 71,524.26 is: 98,703.35
Step by Step Solution
- Step 1: Write the proportion equation
128,876.13 : 177,848.82 = 71,524.26 : x - Step 2: Convert to fraction form
128,876.13/177,848.82 = 71,524.26/x - Step 3: Cross multiply
128,876.13x = 177,848.82 × 71,524.26 - Step 4: Simplify right side
128,876.13x = 12,720,505,242.37 - Step 5: Solve for x
x = 12,720,505,242.37/128,876.13 - Step 6: Final answer
x = 98,703.35
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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.