Finding the Fourth Proportional to 128,674.13, 177,567.27 and 74,955.68
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Solution
The fourth proportional to 128,674.13, 177,567.27 and 74,955.68 is: 103,437.07
Step by Step Solution
- Step 1: Write the proportion equation
128,674.13 : 177,567.27 = 74,955.68 : x - Step 2: Convert to fraction form
128,674.13/177,567.27 = 74,955.68/x - Step 3: Cross multiply
128,674.13x = 177,567.27 × 74,955.68 - Step 4: Simplify right side
128,674.13x = 13,309,675,387.18 - Step 5: Solve for x
x = 13,309,675,387.18/128,674.13 - Step 6: Final answer
x = 103,437.07
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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.