Finding the Fourth Proportional to 122,578.23, 169,171.65 and 74,206.81
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Solution
The fourth proportional to 122,578.23, 169,171.65 and 74,206.81 is: 102,413.69
Step by Step Solution
- Step 1: Write the proportion equation
122,578.23 : 169,171.65 = 74,206.81 : x - Step 2: Convert to fraction form
122,578.23/169,171.65 = 74,206.81/x - Step 3: Cross multiply
122,578.23x = 169,171.65 × 74,206.81 - Step 4: Simplify right side
122,578.23x = 12,553,688,742.18 - Step 5: Solve for x
x = 12,553,688,742.18/122,578.23 - Step 6: Final answer
x = 102,413.69
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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.