Home / 149,299.21-206,028.78-81,314.70

Finding the Fourth Proportional to 149,299.21, 206,028.78 and 81,314.70

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Solution

The fourth proportional to 149,299.21, 206,028.78 and 81,314.70 is: 112,212.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,299.21 : 206,028.78 = 81,314.70 : x
  2. Step 2: Convert to fraction form
    149,299.21/206,028.78 = 81,314.70/x
  3. Step 3: Cross multiply
    149,299.21x = 206,028.78 × 81,314.70
  4. Step 4: Simplify right side
    149,299.21x = 16,753,168,437.07
  5. Step 5: Solve for x
    x = 16,753,168,437.07/149,299.21
  6. Step 6: Final answer
    x = 112,212.04

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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.