Home / 109,712.20-164,568.30-80,187.70

Finding the Fourth Proportional to 109,712.20, 164,568.30 and 80,187.70

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Solution

The fourth proportional to 109,712.20, 164,568.30 and 80,187.70 is: 120,281.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,712.20 : 164,568.30 = 80,187.70 : x
  2. Step 2: Convert to fraction form
    109,712.20/164,568.30 = 80,187.70/x
  3. Step 3: Cross multiply
    109,712.20x = 164,568.30 × 80,187.70
  4. Step 4: Simplify right side
    109,712.20x = 13,196,353,469.91
  5. Step 5: Solve for x
    x = 13,196,353,469.91/109,712.20
  6. Step 6: Final answer
    x = 120,281.55

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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.