Finding the Fourth Proportional to 138,508.91, 191,214.56 and 98,318.68
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Solution
The fourth proportional to 138,508.91, 191,214.56 and 98,318.68 is: 135,731.08
Step by Step Solution
- Step 1: Write the proportion equation
138,508.91 : 191,214.56 = 98,318.68 : x - Step 2: Convert to fraction form
138,508.91/191,214.56 = 98,318.68/x - Step 3: Cross multiply
138,508.91x = 191,214.56 × 98,318.68 - Step 4: Simplify right side
138,508.91x = 18,799,963,135.98 - Step 5: Solve for x
x = 18,799,963,135.98/138,508.91 - Step 6: Final answer
x = 135,731.08
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1.5x scale
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.