Finding the Fourth Proportional to 81,305.47, 121,831.77 and 56,394.19
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Solution
The fourth proportional to 81,305.47, 121,831.77 and 56,394.19 is: 84,503.59
Step by Step Solution
- Step 1: Write the proportion equation
81,305.47 : 121,831.77 = 56,394.19 : x - Step 2: Convert to fraction form
81,305.47/121,831.77 = 56,394.19/x - Step 3: Cross multiply
81,305.47x = 121,831.77 × 56,394.19 - Step 4: Simplify right side
81,305.47x = 6,870,603,680.84 - Step 5: Solve for x
x = 6,870,603,680.84/81,305.47 - Step 6: Final answer
x = 84,503.59
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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.