Finding the Fourth Proportional to 72,514,878.80, 108,772,318.20 and 68,987,685.20
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Solution
The fourth proportional to 72,514,878.80, 108,772,318.20 and 68,987,685.20 is: 103,481,527.80
Step by Step Solution
- Step 1: Write the proportion equation
72,514,878.80 : 108,772,318.20 = 68,987,685.20 : x - Step 2: Convert to fraction form
72,514,878.80/108,772,318.20 = 68,987,685.20/x - Step 3: Cross multiply
72,514,878.80x = 108,772,318.20 × 68,987,685.20 - Step 4: Simplify right side
72,514,878.80x = 7,503,950,446,455,831 - Step 5: Solve for x
x = 7,503,950,446,455,831/72,514,878.80 - Step 6: Final answer
x = 103,481,527.80
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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.