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Finding the Fourth Proportional to 109,936.20, 164,807.10 and 65,515.80

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Solution

The fourth proportional to 109,936.20, 164,807.10 and 65,515.80 is: 98,215.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,936.20 : 164,807.10 = 65,515.80 : x
  2. Step 2: Convert to fraction form
    109,936.20/164,807.10 = 65,515.80/x
  3. Step 3: Cross multiply
    109,936.20x = 164,807.10 × 65,515.80
  4. Step 4: Simplify right side
    109,936.20x = 10,797,469,002.18
  5. Step 5: Solve for x
    x = 10,797,469,002.18/109,936.20
  6. Step 6: Final answer
    x = 98,215.77

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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.