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Finding the Fourth Proportional to 112,471.20, 168,512.40 and 53,179.20

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Solution

The fourth proportional to 112,471.20, 168,512.40 and 53,179.20 is: 79,676.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,471.20 : 168,512.40 = 53,179.20 : x
  2. Step 2: Convert to fraction form
    112,471.20/168,512.40 = 53,179.20/x
  3. Step 3: Cross multiply
    112,471.20x = 168,512.40 × 53,179.20
  4. Step 4: Simplify right side
    112,471.20x = 8,961,354,622.08
  5. Step 5: Solve for x
    x = 8,961,354,622.08/112,471.20
  6. Step 6: Final answer
    x = 79,676.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.