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Finding the Fourth Proportional to 80,859.35, 121,310.90 and 45,823.61

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Solution

The fourth proportional to 80,859.35, 121,310.90 and 45,823.61 is: 68,747.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,859.35 : 121,310.90 = 45,823.61 : x
  2. Step 2: Convert to fraction form
    80,859.35/121,310.90 = 45,823.61/x
  3. Step 3: Cross multiply
    80,859.35x = 121,310.90 × 45,823.61
  4. Step 4: Simplify right side
    80,859.35x = 5,558,903,370.35
  5. Step 5: Solve for x
    x = 5,558,903,370.35/80,859.35
  6. Step 6: Final answer
    x = 68,747.81

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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.