Finding the Fourth Proportional to 221,643.17, 305,867.31 and 131,031.81
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Solution
The fourth proportional to 221,643.17, 305,867.31 and 131,031.81 is: 180,823.75
Step by Step Solution
- Step 1: Write the proportion equation
221,643.17 : 305,867.31 = 131,031.81 : x - Step 2: Convert to fraction form
221,643.17/305,867.31 = 131,031.81/x - Step 3: Cross multiply
221,643.17x = 305,867.31 × 131,031.81 - Step 4: Simplify right side
221,643.17x = 40,078,347,249.13 - Step 5: Solve for x
x = 40,078,347,249.13/221,643.17 - Step 6: Final answer
x = 180,823.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.