Finding the Fourth Proportional to 223,742.13, 308,777.92 and 128,263.18
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Solution
The fourth proportional to 223,742.13, 308,777.92 and 128,263.18 is: 177,011.09
Step by Step Solution
- Step 1: Write the proportion equation
223,742.13 : 308,777.92 = 128,263.18 : x - Step 2: Convert to fraction form
223,742.13/308,777.92 = 128,263.18/x - Step 3: Cross multiply
223,742.13x = 308,777.92 × 128,263.18 - Step 4: Simplify right side
223,742.13x = 39,604,837,932.99 - Step 5: Solve for x
x = 39,604,837,932.99/223,742.13 - Step 6: Final answer
x = 177,011.09
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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.