Finding the Fourth Proportional to 117,413.78, 162,146.10 and 81,207.99
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Solution
The fourth proportional to 117,413.78, 162,146.10 and 81,207.99 is: 112,146.63
Step by Step Solution
- Step 1: Write the proportion equation
117,413.78 : 162,146.10 = 81,207.99 : x - Step 2: Convert to fraction form
117,413.78/162,146.10 = 81,207.99/x - Step 3: Cross multiply
117,413.78x = 162,146.10 × 81,207.99 - Step 4: Simplify right side
117,413.78x = 13,167,558,867.34 - Step 5: Solve for x
x = 13,167,558,867.34/117,413.78 - Step 6: Final answer
x = 112,146.63
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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.