Finding the Fourth Proportional to 117,159.23, 161,640.05 and 76,869.23
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Solution
The fourth proportional to 117,159.23, 161,640.05 and 76,869.23 is: 106,053.50
Step by Step Solution
- Step 1: Write the proportion equation
117,159.23 : 161,640.05 = 76,869.23 : x - Step 2: Convert to fraction form
117,159.23/161,640.05 = 76,869.23/x - Step 3: Cross multiply
117,159.23x = 161,640.05 × 76,869.23 - Step 4: Simplify right side
117,159.23x = 12,425,145,564.63 - Step 5: Solve for x
x = 12,425,145,564.63/117,159.23 - Step 6: Final answer
x = 106,053.50
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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.