Finding the Fourth Proportional to 100,672.24, 138,929.40 and 55,352.08
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Solution
The fourth proportional to 100,672.24, 138,929.40 and 55,352.08 is: 76,386.81
Step by Step Solution
- Step 1: Write the proportion equation
100,672.24 : 138,929.40 = 55,352.08 : x - Step 2: Convert to fraction form
100,672.24/138,929.40 = 55,352.08/x - Step 3: Cross multiply
100,672.24x = 138,929.40 × 55,352.08 - Step 4: Simplify right side
100,672.24x = 7,690,031,263.15 - Step 5: Solve for x
x = 7,690,031,263.15/100,672.24 - Step 6: Final answer
x = 76,386.81
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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.