Finding the Fourth Proportional to 128,347.61, 177,048.60 and 74,626.69
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Solution
The fourth proportional to 128,347.61, 177,048.60 and 74,626.69 is: 102,943.49
Step by Step Solution
- Step 1: Write the proportion equation
128,347.61 : 177,048.60 = 74,626.69 : x - Step 2: Convert to fraction form
128,347.61/177,048.60 = 74,626.69/x - Step 3: Cross multiply
128,347.61x = 177,048.60 × 74,626.69 - Step 4: Simplify right side
128,347.61x = 13,212,550,987.13 - Step 5: Solve for x
x = 13,212,550,987.13/128,347.61 - Step 6: Final answer
x = 102,943.49
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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.