Finding the Fourth Proportional to 128,075.52, 176,739.84 and 71,485.44
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Solution
The fourth proportional to 128,075.52, 176,739.84 and 71,485.44 is: 98,647.46
Step by Step Solution
- Step 1: Write the proportion equation
128,075.52 : 176,739.84 = 71,485.44 : x - Step 2: Convert to fraction form
128,075.52/176,739.84 = 71,485.44/x - Step 3: Cross multiply
128,075.52x = 176,739.84 × 71,485.44 - Step 4: Simplify right side
128,075.52x = 12,634,325,227.93 - Step 5: Solve for x
x = 12,634,325,227.93/128,075.52 - Step 6: Final answer
x = 98,647.46
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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.