Finding the Fourth Proportional to 128,468.77, 177,272.10 and 74,028.88
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Solution
The fourth proportional to 128,468.77, 177,272.10 and 74,028.88 is: 102,151.32
Step by Step Solution
- Step 1: Write the proportion equation
128,468.77 : 177,272.10 = 74,028.88 : x - Step 2: Convert to fraction form
128,468.77/177,272.10 = 74,028.88/x - Step 3: Cross multiply
128,468.77x = 177,272.10 × 74,028.88 - Step 4: Simplify right side
128,468.77x = 13,123,255,018.25 - Step 5: Solve for x
x = 13,123,255,018.25/128,468.77 - Step 6: Final answer
x = 102,151.32
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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.