Finding the Fourth Proportional to 76,722,578.70, 115,156,625.67 and 47,487,985.63
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Solution
The fourth proportional to 76,722,578.70, 115,156,625.67 and 47,487,985.63 is: 71,277,012.29
Step by Step Solution
- Step 1: Write the proportion equation
76,722,578.70 : 115,156,625.67 = 47,487,985.63 : x - Step 2: Convert to fraction form
76,722,578.70/115,156,625.67 = 47,487,985.63/x - Step 3: Cross multiply
76,722,578.70x = 115,156,625.67 × 47,487,985.63 - Step 4: Simplify right side
76,722,578.70x = 5,468,556,184,728,357 - Step 5: Solve for x
x = 5,468,556,184,728,357/76,722,578.70 - Step 6: Final answer
x = 71,277,012.29
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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.