Finding the Fourth Proportional to 218,739.06, 328,135.95 and 85,602.12
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Solution
The fourth proportional to 218,739.06, 328,135.95 and 85,602.12 is: 128,413.89
Step by Step Solution
- Step 1: Write the proportion equation
218,739.06 : 328,135.95 = 85,602.12 : x - Step 2: Convert to fraction form
218,739.06/328,135.95 = 85,602.12/x - Step 3: Cross multiply
218,739.06x = 328,135.95 × 85,602.12 - Step 4: Simplify right side
218,739.06x = 28,089,132,968.21 - Step 5: Solve for x
x = 28,089,132,968.21/218,739.06 - Step 6: Final answer
x = 128,413.89
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.