Finding the Fourth Proportional to 81,291.99, 121,976.86 and 28,726.23
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Solution
The fourth proportional to 81,291.99, 121,976.86 and 28,726.23 is: 43,103.08
Step by Step Solution
- Step 1: Write the proportion equation
81,291.99 : 121,976.86 = 28,726.23 : x - Step 2: Convert to fraction form
81,291.99/121,976.86 = 28,726.23/x - Step 3: Cross multiply
81,291.99x = 121,976.86 × 28,726.23 - Step 4: Simplify right side
81,291.99x = 3,503,935,335.04 - Step 5: Solve for x
x = 3,503,935,335.04/81,291.99 - Step 6: Final answer
x = 43,103.08
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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.