Finding the Fourth Proportional to 128,427.20, 177,152.04 and 84,820.02
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Solution
The fourth proportional to 128,427.20, 177,152.04 and 84,820.02 is: 117,000.45
Step by Step Solution
- Step 1: Write the proportion equation
128,427.20 : 177,152.04 = 84,820.02 : x - Step 2: Convert to fraction form
128,427.20/177,152.04 = 84,820.02/x - Step 3: Cross multiply
128,427.20x = 177,152.04 × 84,820.02 - Step 4: Simplify right side
128,427.20x = 15,026,039,575.84 - Step 5: Solve for x
x = 15,026,039,575.84/128,427.20 - Step 6: Final answer
x = 117,000.45
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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.