Finding the Fourth Proportional to 278,756,578.72, 418,107,622.56 and 84,669,679.36
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Solution
The fourth proportional to 278,756,578.72, 418,107,622.56 and 84,669,679.36 is: 126,996,243.47
Step by Step Solution
- Step 1: Write the proportion equation
278,756,578.72 : 418,107,622.56 = 84,669,679.36 : x - Step 2: Convert to fraction form
278,756,578.72/418,107,622.56 = 84,669,679.36/x - Step 3: Cross multiply
278,756,578.72x = 418,107,622.56 × 84,669,679.36 - Step 4: Simplify right side
278,756,578.72x = 35,401,038,340,127,104 - Step 5: Solve for x
x = 35,401,038,340,127,104/278,756,578.72 - Step 6: Final answer
x = 126,996,243.47
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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.