Finding the Fourth Proportional to 128,747.46, 177,669.12 and 74,299.26
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Solution
The fourth proportional to 128,747.46, 177,669.12 and 74,299.26 is: 102,531.61
Step by Step Solution
- Step 1: Write the proportion equation
128,747.46 : 177,669.12 = 74,299.26 : x - Step 2: Convert to fraction form
128,747.46/177,669.12 = 74,299.26/x - Step 3: Cross multiply
128,747.46x = 177,669.12 × 74,299.26 - Step 4: Simplify right side
128,747.46x = 13,200,684,140.85 - Step 5: Solve for x
x = 13,200,684,140.85/128,747.46 - Step 6: Final answer
x = 102,531.61
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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.