Home / 149,867.30-206,821.68-81,890.72

Finding the Fourth Proportional to 149,867.30, 206,821.68 and 81,890.72

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Solution

The fourth proportional to 149,867.30, 206,821.68 and 81,890.72 is: 113,011.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,867.30 : 206,821.68 = 81,890.72 : x
  2. Step 2: Convert to fraction form
    149,867.30/206,821.68 = 81,890.72/x
  3. Step 3: Cross multiply
    149,867.30x = 206,821.68 × 81,890.72
  4. Step 4: Simplify right side
    149,867.30x = 16,936,776,286.81
  5. Step 5: Solve for x
    x = 16,936,776,286.81/149,867.30
  6. Step 6: Final answer
    x = 113,011.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.