Finding the Fourth Proportional to 153,717.75, 212,130.50 and 86,649.75
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Solution
The fourth proportional to 153,717.75, 212,130.50 and 86,649.75 is: 119,576.66
Step by Step Solution
- Step 1: Write the proportion equation
153,717.75 : 212,130.50 = 86,649.75 : x - Step 2: Convert to fraction form
153,717.75/212,130.50 = 86,649.75/x - Step 3: Cross multiply
153,717.75x = 212,130.50 × 86,649.75 - Step 4: Simplify right side
153,717.75x = 18,381,054,359.13 - Step 5: Solve for x
x = 18,381,054,359.13/153,717.75 - Step 6: Final answer
x = 119,576.66
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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.