Finding the Fourth Proportional to 128,452.84, 177,221.67 and 74,693.65
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Solution
The fourth proportional to 128,452.84, 177,221.67 and 74,693.65 is: 103,052.09
Step by Step Solution
- Step 1: Write the proportion equation
128,452.84 : 177,221.67 = 74,693.65 : x - Step 2: Convert to fraction form
128,452.84/177,221.67 = 74,693.65/x - Step 3: Cross multiply
128,452.84x = 177,221.67 × 74,693.65 - Step 4: Simplify right side
128,452.84x = 13,237,333,391.40 - Step 5: Solve for x
x = 13,237,333,391.40/128,452.84 - Step 6: Final answer
x = 103,052.09
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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.