Finding the Fourth Proportional to 76,960,691.20, 115,441,036.80 and 47,735,372.80
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Solution
The fourth proportional to 76,960,691.20, 115,441,036.80 and 47,735,372.80 is: 71,603,059.20
Step by Step Solution
- Step 1: Write the proportion equation
76,960,691.20 : 115,441,036.80 = 47,735,372.80 : x - Step 2: Convert to fraction form
76,960,691.20/115,441,036.80 = 47,735,372.80/x - Step 3: Cross multiply
76,960,691.20x = 115,441,036.80 × 47,735,372.80 - Step 4: Simplify right side
76,960,691.20x = 5,510,620,928,066,519 - Step 5: Solve for x
x = 5,510,620,928,066,519/76,960,691.20 - Step 6: Final answer
x = 71,603,059.20
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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.