Finding the Fourth Proportional to 139,413.24, 192,390.74 and 78,995.07
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Solution
The fourth proportional to 139,413.24, 192,390.74 and 78,995.07 is: 109,013.46
Step by Step Solution
- Step 1: Write the proportion equation
139,413.24 : 192,390.74 = 78,995.07 : x - Step 2: Convert to fraction form
139,413.24/192,390.74 = 78,995.07/x - Step 3: Cross multiply
139,413.24x = 192,390.74 × 78,995.07 - Step 4: Simplify right side
139,413.24x = 15,197,919,973.65 - Step 5: Solve for x
x = 15,197,919,973.65/139,413.24 - Step 6: Final answer
x = 109,013.46
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1.5x scale
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.