Finding the Fourth Proportional to 128,115,519.11, 176,799,586.87 and 69,378,285.53
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Solution
The fourth proportional to 128,115,519.11, 176,799,586.87 and 69,378,285.53 is: 95,742,126.36
Step by Step Solution
- Step 1: Write the proportion equation
128,115,519.11 : 176,799,586.87 = 69,378,285.53 : x - Step 2: Convert to fraction form
128,115,519.11/176,799,586.87 = 69,378,285.53/x - Step 3: Cross multiply
128,115,519.11x = 176,799,586.87 × 69,378,285.53 - Step 4: Simplify right side
128,115,519.11x = 12,266,052,219,452,900 - Step 5: Solve for x
x = 12,266,052,219,452,900/128,115,519.11 - Step 6: Final answer
x = 95,742,126.36
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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.