Finding the Fourth Proportional to 128,592.88, 177,442.20 and 71,995.12
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Solution
The fourth proportional to 128,592.88, 177,442.20 and 71,995.12 is: 99,344.32
Step by Step Solution
- Step 1: Write the proportion equation
128,592.88 : 177,442.20 = 71,995.12 : x - Step 2: Convert to fraction form
128,592.88/177,442.20 = 71,995.12/x - Step 3: Cross multiply
128,592.88x = 177,442.20 × 71,995.12 - Step 4: Simplify right side
128,592.88x = 12,774,972,482.06 - Step 5: Solve for x
x = 12,774,972,482.06/128,592.88 - Step 6: Final answer
x = 99,344.32
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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.