Finding the Fourth Proportional to 128,335.26, 177,103.77 and 71,746.62
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Solution
The fourth proportional to 128,335.26, 177,103.77 and 71,746.62 is: 99,010.96
Step by Step Solution
- Step 1: Write the proportion equation
128,335.26 : 177,103.77 = 71,746.62 : x - Step 2: Convert to fraction form
128,335.26/177,103.77 = 71,746.62/x - Step 3: Cross multiply
128,335.26x = 177,103.77 × 71,746.62 - Step 4: Simplify right side
128,335.26x = 12,706,596,886.76 - Step 5: Solve for x
x = 12,706,596,886.76/128,335.26 - Step 6: Final answer
x = 99,010.96
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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.