Finding the Fourth Proportional to 76,723,147.31, 115,157,478.74 and 47,488,554.20
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Solution
The fourth proportional to 76,723,147.31, 115,157,478.74 and 47,488,554.20 is: 71,277,865.45
Step by Step Solution
- Step 1: Write the proportion equation
76,723,147.31 : 115,157,478.74 = 47,488,554.20 : x - Step 2: Convert to fraction form
76,723,147.31/115,157,478.74 = 47,488,554.20/x - Step 3: Cross multiply
76,723,147.31x = 115,157,478.74 × 47,488,554.20 - Step 4: Simplify right side
76,723,147.31x = 5,468,662,170,730,289 - Step 5: Solve for x
x = 5,468,662,170,730,289/76,723,147.31 - Step 6: Final answer
x = 71,277,865.45
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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.