Finding the Fourth Proportional to 128,624.94, 177,507.88 and 74,901.28
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Solution
The fourth proportional to 128,624.94, 177,507.88 and 74,901.28 is: 103,366.95
Step by Step Solution
- Step 1: Write the proportion equation
128,624.94 : 177,507.88 = 74,901.28 : x - Step 2: Convert to fraction form
128,624.94/177,507.88 = 74,901.28/x - Step 3: Cross multiply
128,624.94x = 177,507.88 × 74,901.28 - Step 4: Simplify right side
128,624.94x = 13,295,567,422.09 - Step 5: Solve for x
x = 13,295,567,422.09/128,624.94 - Step 6: Final answer
x = 103,366.95
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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.