Home / 149,964.21-206,948.82-81,981.32

Finding the Fourth Proportional to 149,964.21, 206,948.82 and 81,981.32

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Solution

The fourth proportional to 149,964.21, 206,948.82 and 81,981.32 is: 113,133.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,964.21 : 206,948.82 = 81,981.32 : x
  2. Step 2: Convert to fraction form
    149,964.21/206,948.82 = 81,981.32/x
  3. Step 3: Cross multiply
    149,964.21x = 206,948.82 × 81,981.32
  4. Step 4: Simplify right side
    149,964.21x = 16,965,936,708.73
  5. Step 5: Solve for x
    x = 16,965,936,708.73/149,964.21
  6. Step 6: Final answer
    x = 113,133.24

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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.