Finding the Fourth Proportional to 81,232,162.62, 121,846,671.45 and 19,821,721.02
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Solution
The fourth proportional to 81,232,162.62, 121,846,671.45 and 19,821,721.02 is: 29,732,197.82
Step by Step Solution
- Step 1: Write the proportion equation
81,232,162.62 : 121,846,671.45 = 19,821,721.02 : x - Step 2: Convert to fraction form
81,232,162.62/121,846,671.45 = 19,821,721.02/x - Step 3: Cross multiply
81,232,162.62x = 121,846,671.45 × 19,821,721.02 - Step 4: Simplify right side
81,232,162.62x = 2,415,210,728,697,499 - Step 5: Solve for x
x = 2,415,210,728,697,499/81,232,162.62 - Step 6: Final answer
x = 29,732,197.82
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.