Finding the Fourth Proportional to 218,967.17, 302,174.91 and 128,305.08
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Solution
The fourth proportional to 218,967.17, 302,174.91 and 128,305.08 is: 177,061.14
Step by Step Solution
- Step 1: Write the proportion equation
218,967.17 : 302,174.91 = 128,305.08 : x - Step 2: Convert to fraction form
218,967.17/302,174.91 = 128,305.08/x - Step 3: Cross multiply
218,967.17x = 302,174.91 × 128,305.08 - Step 4: Simplify right side
218,967.17x = 38,770,576,001.54 - Step 5: Solve for x
x = 38,770,576,001.54/218,967.17 - Step 6: Final answer
x = 177,061.14
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1.5x scale
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.