Finding the Fourth Proportional to 128,125.44, 176,799.60 and 74,399.88
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Solution
The fourth proportional to 128,125.44, 176,799.60 and 74,399.88 is: 102,663.99
Step by Step Solution
- Step 1: Write the proportion equation
128,125.44 : 176,799.60 = 74,399.88 : x - Step 2: Convert to fraction form
128,125.44/176,799.60 = 74,399.88/x - Step 3: Cross multiply
128,125.44x = 176,799.60 × 74,399.88 - Step 4: Simplify right side
128,125.44x = 13,153,869,024.05 - Step 5: Solve for x
x = 13,153,869,024.05/128,125.44 - Step 6: Final answer
x = 102,663.99
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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.