Finding the Fourth Proportional to 101,117.75, 139,542.50 and 56,405.75
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Solution
The fourth proportional to 101,117.75, 139,542.50 and 56,405.75 is: 77,839.94
Step by Step Solution
- Step 1: Write the proportion equation
101,117.75 : 139,542.50 = 56,405.75 : x - Step 2: Convert to fraction form
101,117.75/139,542.50 = 56,405.75/x - Step 3: Cross multiply
101,117.75x = 139,542.50 × 56,405.75 - Step 4: Simplify right side
101,117.75x = 7,870,999,369.38 - Step 5: Solve for x
x = 7,870,999,369.38/101,117.75 - Step 6: Final answer
x = 77,839.94
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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.