Finding the Fourth Proportional to 128,464.40, 177,352.30 and 77,489.98
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Solution
The fourth proportional to 128,464.40, 177,352.30 and 77,489.98 is: 106,979.26
Step by Step Solution
- Step 1: Write the proportion equation
128,464.40 : 177,352.30 = 77,489.98 : x - Step 2: Convert to fraction form
128,464.40/177,352.30 = 77,489.98/x - Step 3: Cross multiply
128,464.40x = 177,352.30 × 77,489.98 - Step 4: Simplify right side
128,464.40x = 13,743,026,179.95 - Step 5: Solve for x
x = 13,743,026,179.95/128,464.40 - Step 6: Final answer
x = 106,979.26
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1.5x scale
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.