Finding the Fourth Proportional to 128,944.05, 177,935.99 and 72,354.21
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Solution
The fourth proportional to 128,944.05, 177,935.99 and 72,354.21 is: 99,844.99
Step by Step Solution
- Step 1: Write the proportion equation
128,944.05 : 177,935.99 = 72,354.21 : x - Step 2: Convert to fraction form
128,944.05/177,935.99 = 72,354.21/x - Step 3: Cross multiply
128,944.05x = 177,935.99 × 72,354.21 - Step 4: Simplify right side
128,944.05x = 12,874,417,625.25 - Step 5: Solve for x
x = 12,874,417,625.25/128,944.05 - Step 6: Final answer
x = 99,844.99
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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.