Finding the Fourth Proportional to 42,658,207.20, 63,987,310.80 and 18,723,679.20
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Solution
The fourth proportional to 42,658,207.20, 63,987,310.80 and 18,723,679.20 is: 28,085,518.80
Step by Step Solution
- Step 1: Write the proportion equation
42,658,207.20 : 63,987,310.80 = 18,723,679.20 : x - Step 2: Convert to fraction form
42,658,207.20/63,987,310.80 = 18,723,679.20/x - Step 3: Cross multiply
42,658,207.20x = 63,987,310.80 × 18,723,679.20 - Step 4: Simplify right side
42,658,207.20x = 1,198,077,880,289,895.25 - Step 5: Solve for x
x = 1,198,077,880,289,895.25/42,658,207.20 - Step 6: Final answer
x = 28,085,518.80
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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.