Finding the Fourth Proportional to 153,997.79, 212,514.71 and 86,015.75
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Solution
The fourth proportional to 153,997.79, 212,514.71 and 86,015.75 is: 118,700.48
Step by Step Solution
- Step 1: Write the proportion equation
153,997.79 : 212,514.71 = 86,015.75 : x - Step 2: Convert to fraction form
153,997.79/212,514.71 = 86,015.75/x - Step 3: Cross multiply
153,997.79x = 212,514.71 × 86,015.75 - Step 4: Simplify right side
153,997.79x = 18,279,610,674.03 - Step 5: Solve for x
x = 18,279,610,674.03/153,997.79 - Step 6: Final answer
x = 118,700.48
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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.