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Finding the Fourth Proportional to 80,697.39, 120,919.56 and 51,052.61

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Solution

The fourth proportional to 80,697.39, 120,919.56 and 51,052.61 is: 76,498.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,697.39 : 120,919.56 = 51,052.61 : x
  2. Step 2: Convert to fraction form
    80,697.39/120,919.56 = 51,052.61/x
  3. Step 3: Cross multiply
    80,697.39x = 120,919.56 × 51,052.61
  4. Step 4: Simplify right side
    80,697.39x = 6,173,258,533.45
  5. Step 5: Solve for x
    x = 6,173,258,533.45/80,697.39
  6. Step 6: Final answer
    x = 76,498.86

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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.