Finding the Fourth Proportional to 143,135.76, 215,708.95 and 128,922.08
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Solution
The fourth proportional to 143,135.76, 215,708.95 and 128,922.08 is: 194,288.60
Step by Step Solution
- Step 1: Write the proportion equation
143,135.76 : 215,708.95 = 128,922.08 : x - Step 2: Convert to fraction form
143,135.76/215,708.95 = 128,922.08/x - Step 3: Cross multiply
143,135.76x = 215,708.95 × 128,922.08 - Step 4: Simplify right side
143,135.76x = 27,809,645,324.73 - Step 5: Solve for x
x = 27,809,645,324.73/143,135.76 - Step 6: Final answer
x = 194,288.60
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.