Finding the Fourth Proportional to 74,721.81, 112,089.14 and 21,413.99
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Solution
The fourth proportional to 74,721.81, 112,089.14 and 21,413.99 is: 32,122.82
Step by Step Solution
- Step 1: Write the proportion equation
74,721.81 : 112,089.14 = 21,413.99 : x - Step 2: Convert to fraction form
74,721.81/112,089.14 = 21,413.99/x - Step 3: Cross multiply
74,721.81x = 112,089.14 × 21,413.99 - Step 4: Simplify right side
74,721.81x = 2,400,275,055.55 - Step 5: Solve for x
x = 2,400,275,055.55/74,721.81 - Step 6: Final answer
x = 32,122.82
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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.