Finding the Fourth Proportional to 128,339.22, 177,108.51 and 71,750.58
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Solution
The fourth proportional to 128,339.22, 177,108.51 and 71,750.58 is: 99,016.02
Step by Step Solution
- Step 1: Write the proportion equation
128,339.22 : 177,108.51 = 71,750.58 : x - Step 2: Convert to fraction form
128,339.22/177,108.51 = 71,750.58/x - Step 3: Cross multiply
128,339.22x = 177,108.51 × 71,750.58 - Step 4: Simplify right side
128,339.22x = 12,707,638,315.44 - Step 5: Solve for x
x = 12,707,638,315.44/128,339.22 - Step 6: Final answer
x = 99,016.02
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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.