Finding the Fourth Proportional to 211,553,469.12, 315,905,599.32 and 172,768,860.84
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Solution
The fourth proportional to 211,553,469.12, 315,905,599.32 and 172,768,860.84 is: 257,989,863.06
Step by Step Solution
- Step 1: Write the proportion equation
211,553,469.12 : 315,905,599.32 = 172,768,860.84 : x - Step 2: Convert to fraction form
211,553,469.12/315,905,599.32 = 172,768,860.84/x - Step 3: Cross multiply
211,553,469.12x = 315,905,599.32 × 172,768,860.84 - Step 4: Simplify right side
211,553,469.12x = 54,578,650,527,493,880 - Step 5: Solve for x
x = 54,578,650,527,493,880/211,553,469.12 - Step 6: Final answer
x = 257,989,863.06
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.