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Finding the Fourth Proportional to 143,953.92, 198,609.84 and 80,279.28

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Solution

The fourth proportional to 143,953.92, 198,609.84 and 80,279.28 is: 110,759.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,953.92 : 198,609.84 = 80,279.28 : x
  2. Step 2: Convert to fraction form
    143,953.92/198,609.84 = 80,279.28/x
  3. Step 3: Cross multiply
    143,953.92x = 198,609.84 × 80,279.28
  4. Step 4: Simplify right side
    143,953.92x = 15,944,254,956.12
  5. Step 5: Solve for x
    x = 15,944,254,956.12/143,953.92
  6. Step 6: Final answer
    x = 110,759.44

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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.