Finding the Fourth Proportional to 122,729.28, 168,327.12 and 121,275.20
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Solution
The fourth proportional to 122,729.28, 168,327.12 and 121,275.20 is: 166,332.80
Step by Step Solution
- Step 1: Write the proportion equation
122,729.28 : 168,327.12 = 121,275.20 : x - Step 2: Convert to fraction form
122,729.28/168,327.12 = 121,275.20/x - Step 3: Cross multiply
122,729.28x = 168,327.12 × 121,275.20 - Step 4: Simplify right side
122,729.28x = 20,413,905,143.42 - Step 5: Solve for x
x = 20,413,905,143.42/122,729.28 - Step 6: Final answer
x = 166,332.80
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.