Finding the Fourth Proportional to 128,638.97, 177,521.61 and 71,282.01
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Solution
The fourth proportional to 128,638.97, 177,521.61 and 71,282.01 is: 98,369.08
Step by Step Solution
- Step 1: Write the proportion equation
128,638.97 : 177,521.61 = 71,282.01 : x - Step 2: Convert to fraction form
128,638.97/177,521.61 = 71,282.01/x - Step 3: Cross multiply
128,638.97x = 177,521.61 × 71,282.01 - Step 4: Simplify right side
128,638.97x = 12,654,096,779.13 - Step 5: Solve for x
x = 12,654,096,779.13/128,638.97 - Step 6: Final answer
x = 98,369.08
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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.