Finding the Fourth Proportional to 138,615.20, 191,288.84 and 74,952.84
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Solution
The fourth proportional to 138,615.20, 191,288.84 and 74,952.84 is: 103,434.85
Step by Step Solution
- Step 1: Write the proportion equation
138,615.20 : 191,288.84 = 74,952.84 : x - Step 2: Convert to fraction form
138,615.20/191,288.84 = 74,952.84/x - Step 3: Cross multiply
138,615.20x = 191,288.84 × 74,952.84 - Step 4: Simplify right side
138,615.20x = 14,337,642,582.48 - Step 5: Solve for x
x = 14,337,642,582.48/138,615.20 - Step 6: Final answer
x = 103,434.85
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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.