Finding the Fourth Proportional to 112,931,218.24, 155,757,221.36 and 81,686,473.20
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Solution
The fourth proportional to 112,931,218.24, 155,757,221.36 and 81,686,473.20 is: 112,663,781.43
Step by Step Solution
- Step 1: Write the proportion equation
112,931,218.24 : 155,757,221.36 = 81,686,473.20 : x - Step 2: Convert to fraction form
112,931,218.24/155,757,221.36 = 81,686,473.20/x - Step 3: Cross multiply
112,931,218.24x = 155,757,221.36 × 81,686,473.20 - Step 4: Simplify right side
112,931,218.24x = 12,723,258,088,330,110 - Step 5: Solve for x
x = 12,723,258,088,330,110/112,931,218.24 - Step 6: Final answer
x = 112,663,781.43
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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.