Finding the Fourth Proportional to 117,070.18, 161,491.08 and 74,036.40
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Solution
The fourth proportional to 117,070.18, 161,491.08 and 74,036.40 is: 102,128.64
Step by Step Solution
- Step 1: Write the proportion equation
117,070.18 : 161,491.08 = 74,036.40 : x - Step 2: Convert to fraction form
117,070.18/161,491.08 = 74,036.40/x - Step 3: Cross multiply
117,070.18x = 161,491.08 × 74,036.40 - Step 4: Simplify right side
117,070.18x = 11,956,218,195.31 - Step 5: Solve for x
x = 11,956,218,195.31/117,070.18 - Step 6: Final answer
x = 102,128.64
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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.