Home / 149,948.45-206,928.86-81,965.70

Finding the Fourth Proportional to 149,948.45, 206,928.86 and 81,965.70

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Solution

The fourth proportional to 149,948.45, 206,928.86 and 81,965.70 is: 113,112.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,948.45 : 206,928.86 = 81,965.70 : x
  2. Step 2: Convert to fraction form
    149,948.45/206,928.86 = 81,965.70/x
  3. Step 3: Cross multiply
    149,948.45x = 206,928.86 × 81,965.70
  4. Step 4: Simplify right side
    149,948.45x = 16,961,068,450.27
  5. Step 5: Solve for x
    x = 16,961,068,450.27/149,948.45
  6. Step 6: Final answer
    x = 113,112.67

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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.