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Finding the Fourth Proportional to 149,645.70, 206,508.06 and 81,664.02

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Solution

The fourth proportional to 149,645.70, 206,508.06 and 81,664.02 is: 112,694.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,645.70 : 206,508.06 = 81,664.02 : x
  2. Step 2: Convert to fraction form
    149,645.70/206,508.06 = 81,664.02/x
  3. Step 3: Cross multiply
    149,645.70x = 206,508.06 × 81,664.02
  4. Step 4: Simplify right side
    149,645.70x = 16,864,278,342.00
  5. Step 5: Solve for x
    x = 16,864,278,342.00/149,645.70
  6. Step 6: Final answer
    x = 112,694.71

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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.