Finding the Fourth Proportional to 117,163.20, 161,681.76 and 66,178.02
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Solution
The fourth proportional to 117,163.20, 161,681.76 and 66,178.02 is: 91,323.72
Step by Step Solution
- Step 1: Write the proportion equation
117,163.20 : 161,681.76 = 66,178.02 : x - Step 2: Convert to fraction form
117,163.20/161,681.76 = 66,178.02/x - Step 3: Cross multiply
117,163.20x = 161,681.76 × 66,178.02 - Step 4: Simplify right side
117,163.20x = 10,699,778,746.92 - Step 5: Solve for x
x = 10,699,778,746.92/117,163.20 - Step 6: Final answer
x = 91,323.72
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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.