Finding the Fourth Proportional to 128,790,700.80, 193,186,051.20 and 77,134,635.60
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Solution
The fourth proportional to 128,790,700.80, 193,186,051.20 and 77,134,635.60 is: 115,701,953.40
Step by Step Solution
- Step 1: Write the proportion equation
128,790,700.80 : 193,186,051.20 = 77,134,635.60 : x - Step 2: Convert to fraction form
128,790,700.80/193,186,051.20 = 77,134,635.60/x - Step 3: Cross multiply
128,790,700.80x = 193,186,051.20 × 77,134,635.60 - Step 4: Simplify right side
128,790,700.80x = 14,901,335,662,314,940 - Step 5: Solve for x
x = 14,901,335,662,314,940/128,790,700.80 - Step 6: Final answer
x = 115,701,953.40
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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.