Finding the Fourth Proportional to 100,295.47, 138,402.12 and 54,964.81
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Solution
The fourth proportional to 100,295.47, 138,402.12 and 54,964.81 is: 75,848.35
Step by Step Solution
- Step 1: Write the proportion equation
100,295.47 : 138,402.12 = 54,964.81 : x - Step 2: Convert to fraction form
100,295.47/138,402.12 = 54,964.81/x - Step 3: Cross multiply
100,295.47x = 138,402.12 × 54,964.81 - Step 4: Simplify right side
100,295.47x = 7,607,246,229.40 - Step 5: Solve for x
x = 7,607,246,229.40/100,295.47 - Step 6: Final answer
x = 75,848.35
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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.