Finding the Fourth Proportional to 128,115,520.12, 176,799,588.26 and 69,378,286.52
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Solution
The fourth proportional to 128,115,520.12, 176,799,588.26 and 69,378,286.52 is: 95,742,127.73
Step by Step Solution
- Step 1: Write the proportion equation
128,115,520.12 : 176,799,588.26 = 69,378,286.52 : x - Step 2: Convert to fraction form
128,115,520.12/176,799,588.26 = 69,378,286.52/x - Step 3: Cross multiply
128,115,520.12x = 176,799,588.26 × 69,378,286.52 - Step 4: Simplify right side
128,115,520.12x = 12,266,052,490,920,306 - Step 5: Solve for x
x = 12,266,052,490,920,306/128,115,520.12 - Step 6: Final answer
x = 95,742,127.73
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.