Finding the Fourth Proportional to 128,037.96, 176,708.34 and 74,311.40
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Solution
The fourth proportional to 128,037.96, 176,708.34 and 74,311.40 is: 102,558.99
Step by Step Solution
- Step 1: Write the proportion equation
128,037.96 : 176,708.34 = 74,311.40 : x - Step 2: Convert to fraction form
128,037.96/176,708.34 = 74,311.40/x - Step 3: Cross multiply
128,037.96x = 176,708.34 × 74,311.40 - Step 4: Simplify right side
128,037.96x = 13,131,444,137.08 - Step 5: Solve for x
x = 13,131,444,137.08/128,037.96 - Step 6: Final answer
x = 102,558.99
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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.