Finding the Fourth Proportional to 138,276.18, 190,823.58 and 81,687.42
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Solution
The fourth proportional to 138,276.18, 190,823.58 and 81,687.42 is: 112,730.09
Step by Step Solution
- Step 1: Write the proportion equation
138,276.18 : 190,823.58 = 81,687.42 : x - Step 2: Convert to fraction form
138,276.18/190,823.58 = 81,687.42/x - Step 3: Cross multiply
138,276.18x = 190,823.58 × 81,687.42 - Step 4: Simplify right side
138,276.18x = 15,587,885,925.36 - Step 5: Solve for x
x = 15,587,885,925.36/138,276.18 - Step 6: Final answer
x = 112,730.09
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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.