Finding the Fourth Proportional to 218,968.18, 302,176.31 and 128,306.08
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Solution
The fourth proportional to 218,968.18, 302,176.31 and 128,306.08 is: 177,062.52
Step by Step Solution
- Step 1: Write the proportion equation
218,968.18 : 302,176.31 = 128,306.08 : x - Step 2: Convert to fraction form
218,968.18/302,176.31 = 128,306.08/x - Step 3: Cross multiply
218,968.18x = 302,176.31 × 128,306.08 - Step 4: Simplify right side
218,968.18x = 38,771,057,804.96 - Step 5: Solve for x
x = 38,771,057,804.96/218,968.18 - Step 6: Final answer
x = 177,062.52
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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.