Home / 111,215.40-166,823.10-66,819.30

Finding the Fourth Proportional to 111,215.40, 166,823.10 and 66,819.30

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Solution

The fourth proportional to 111,215.40, 166,823.10 and 66,819.30 is: 100,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,215.40 : 166,823.10 = 66,819.30 : x
  2. Step 2: Convert to fraction form
    111,215.40/166,823.10 = 66,819.30/x
  3. Step 3: Cross multiply
    111,215.40x = 166,823.10 × 66,819.30
  4. Step 4: Simplify right side
    111,215.40x = 11,147,002,765.83
  5. Step 5: Solve for x
    x = 11,147,002,765.83/111,215.40
  6. Step 6: Final answer
    x = 100,228.95

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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.