Finding the Fourth Proportional to 128,158.10, 176,850.84 and 76,533.44
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Solution
The fourth proportional to 128,158.10, 176,850.84 and 76,533.44 is: 105,611.77
Step by Step Solution
- Step 1: Write the proportion equation
128,158.10 : 176,850.84 = 76,533.44 : x - Step 2: Convert to fraction form
128,158.10/176,850.84 = 76,533.44/x - Step 3: Cross multiply
128,158.10x = 176,850.84 × 76,533.44 - Step 4: Simplify right side
128,158.10x = 13,535,003,152.09 - Step 5: Solve for x
x = 13,535,003,152.09/128,158.10 - Step 6: Final answer
x = 105,611.77
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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.