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Finding the Fourth Proportional to 169,285.21, 253,709.11 and 80,565.91

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Solution

The fourth proportional to 169,285.21, 253,709.11 and 80,565.91 is: 120,744.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,285.21 : 253,709.11 = 80,565.91 : x
  2. Step 2: Convert to fraction form
    169,285.21/253,709.11 = 80,565.91/x
  3. Step 3: Cross multiply
    169,285.21x = 253,709.11 × 80,565.91
  4. Step 4: Simplify right side
    169,285.21x = 20,440,305,322.44
  5. Step 5: Solve for x
    x = 20,440,305,322.44/169,285.21
  6. Step 6: Final answer
    x = 120,744.78

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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.