Finding the Fourth Proportional to 70,539.59, 105,812.85 and 28,413.99
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Solution
The fourth proportional to 70,539.59, 105,812.85 and 28,413.99 is: 42,622.38
Step by Step Solution
- Step 1: Write the proportion equation
70,539.59 : 105,812.85 = 28,413.99 : x - Step 2: Convert to fraction form
70,539.59/105,812.85 = 28,413.99/x - Step 3: Cross multiply
70,539.59x = 105,812.85 × 28,413.99 - Step 4: Simplify right side
70,539.59x = 3,006,565,261.77 - Step 5: Solve for x
x = 3,006,565,261.77/70,539.59 - Step 6: Final answer
x = 42,622.38
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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.