Finding the Fourth Proportional to 128,843.66, 177,805.71 and 71,484.05
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Solution
The fourth proportional to 128,843.66, 177,805.71 and 71,484.05 is: 98,648.80
Step by Step Solution
- Step 1: Write the proportion equation
128,843.66 : 177,805.71 = 71,484.05 : x - Step 2: Convert to fraction form
128,843.66/177,805.71 = 71,484.05/x - Step 3: Cross multiply
128,843.66x = 177,805.71 × 71,484.05 - Step 4: Simplify right side
128,843.66x = 12,710,271,374.90 - Step 5: Solve for x
x = 12,710,271,374.90/128,843.66 - Step 6: Final answer
x = 98,648.80
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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.