Finding the Fourth Proportional to 121,287,130.20, 181,930,695.30 and 99,763,769.70
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Solution
The fourth proportional to 121,287,130.20, 181,930,695.30 and 99,763,769.70 is: 149,645,654.55
Step by Step Solution
- Step 1: Write the proportion equation
121,287,130.20 : 181,930,695.30 = 99,763,769.70 : x - Step 2: Convert to fraction form
121,287,130.20/181,930,695.30 = 99,763,769.70/x - Step 3: Cross multiply
121,287,130.20x = 181,930,695.30 × 99,763,769.70 - Step 4: Simplify right side
121,287,130.20x = 18,150,091,987,270,076 - Step 5: Solve for x
x = 18,150,091,987,270,076/121,287,130.20 - Step 6: Final answer
x = 149,645,654.55
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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.