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Finding the Fourth Proportional to 149,956.91, 206,940.59 and 81,974.19

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Solution

The fourth proportional to 149,956.91, 206,940.59 and 81,974.19 is: 113,124.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,956.91 : 206,940.59 = 81,974.19 : x
  2. Step 2: Convert to fraction form
    149,956.91/206,940.59 = 81,974.19/x
  3. Step 3: Cross multiply
    149,956.91x = 206,940.59 × 81,974.19
  4. Step 4: Simplify right side
    149,956.91x = 16,963,785,798.80
  5. Step 5: Solve for x
    x = 16,963,785,798.80/149,956.91
  6. Step 6: Final answer
    x = 113,124.40

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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.