Finding the Fourth Proportional to 128,615.40, 177,485.13 and 71,252.37
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Solution
The fourth proportional to 128,615.40, 177,485.13 and 71,252.37 is: 98,325.99
Step by Step Solution
- Step 1: Write the proportion equation
128,615.40 : 177,485.13 = 71,252.37 : x - Step 2: Convert to fraction form
128,615.40/177,485.13 = 71,252.37/x - Step 3: Cross multiply
128,615.40x = 177,485.13 × 71,252.37 - Step 4: Simplify right side
128,615.40x = 12,646,236,152.26 - Step 5: Solve for x
x = 12,646,236,152.26/128,615.40 - Step 6: Final answer
x = 98,325.99
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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.