Home / 149,905.56-206,870.60-81,921.72

Finding the Fourth Proportional to 149,905.56, 206,870.60 and 81,921.72

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Solution

The fourth proportional to 149,905.56, 206,870.60 and 81,921.72 is: 113,052.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,905.56 : 206,870.60 = 81,921.72 : x
  2. Step 2: Convert to fraction form
    149,905.56/206,870.60 = 81,921.72/x
  3. Step 3: Cross multiply
    149,905.56x = 206,870.60 × 81,921.72
  4. Step 4: Simplify right side
    149,905.56x = 16,947,195,369.43
  5. Step 5: Solve for x
    x = 16,947,195,369.43/149,905.56
  6. Step 6: Final answer
    x = 113,052.48

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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.