Finding the Fourth Proportional to 5,163,919.20, 7,125,709.92 and 2,988,029.28
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Solution
The fourth proportional to 5,163,919.20, 7,125,709.92 and 2,988,029.28 is: 4,123,191.91
Step by Step Solution
- Step 1: Write the proportion equation
5,163,919.20 : 7,125,709.92 = 2,988,029.28 : x - Step 2: Convert to fraction form
5,163,919.20/7,125,709.92 = 2,988,029.28/x - Step 3: Cross multiply
5,163,919.20x = 7,125,709.92 × 2,988,029.28 - Step 4: Simplify right side
5,163,919.20x = 21,291,829,881,746.46 - Step 5: Solve for x
x = 21,291,829,881,746.46/5,163,919.20 - Step 6: Final answer
x = 4,123,191.91
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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.