Finding the Fourth Proportional to 79,418,812.20, 119,128,218.30 and 28,358,485.80
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Solution
The fourth proportional to 79,418,812.20, 119,128,218.30 and 28,358,485.80 is: 42,537,728.70
Step by Step Solution
- Step 1: Write the proportion equation
79,418,812.20 : 119,128,218.30 = 28,358,485.80 : x - Step 2: Convert to fraction form
79,418,812.20/119,128,218.30 = 28,358,485.80/x - Step 3: Cross multiply
79,418,812.20x = 119,128,218.30 × 28,358,485.80 - Step 4: Simplify right side
79,418,812.20x = 3,378,295,887,039,850 - Step 5: Solve for x
x = 3,378,295,887,039,850/79,418,812.20 - Step 6: Final answer
x = 42,537,728.70
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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.