Finding the Fourth Proportional to 207,749.12, 286,556.16 and 128,122.88
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Solution
The fourth proportional to 207,749.12, 286,556.16 and 128,122.88 is: 176,724.70
Step by Step Solution
- Step 1: Write the proportion equation
207,749.12 : 286,556.16 = 128,122.88 : x - Step 2: Convert to fraction form
207,749.12/286,556.16 = 128,122.88/x - Step 3: Cross multiply
207,749.12x = 286,556.16 × 128,122.88 - Step 4: Simplify right side
207,749.12x = 36,714,400,500.94 - Step 5: Solve for x
x = 36,714,400,500.94/207,749.12 - Step 6: Final answer
x = 176,724.70
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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.