Finding the Fourth Proportional to 153,755.62, 212,207.45 and 128,216.93
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Solution
The fourth proportional to 153,755.62, 212,207.45 and 128,216.93 is: 176,959.95
Step by Step Solution
- Step 1: Write the proportion equation
153,755.62 : 212,207.45 = 128,216.93 : x - Step 2: Convert to fraction form
153,755.62/212,207.45 = 128,216.93/x - Step 3: Cross multiply
153,755.62x = 212,207.45 × 128,216.93 - Step 4: Simplify right side
153,755.62x = 27,208,586,060.01 - Step 5: Solve for x
x = 27,208,586,060.01/153,755.62 - Step 6: Final answer
x = 176,959.95
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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.