Finding the Fourth Proportional to 92,218.70, 138,328.05 and 86,313.80
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Solution
The fourth proportional to 92,218.70, 138,328.05 and 86,313.80 is: 129,470.70
Step by Step Solution
- Step 1: Write the proportion equation
92,218.70 : 138,328.05 = 86,313.80 : x - Step 2: Convert to fraction form
92,218.70/138,328.05 = 86,313.80/x - Step 3: Cross multiply
92,218.70x = 138,328.05 × 86,313.80 - Step 4: Simplify right side
92,218.70x = 11,939,619,642.09 - Step 5: Solve for x
x = 11,939,619,642.09/92,218.70 - Step 6: Final answer
x = 129,470.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.