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Finding the Fourth Proportional to 149,900.60, 206,859.30 and 81,914.60

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Solution

The fourth proportional to 149,900.60, 206,859.30 and 81,914.60 is: 113,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,900.60 : 206,859.30 = 81,914.60 : x
  2. Step 2: Convert to fraction form
    149,900.60/206,859.30 = 81,914.60/x
  3. Step 3: Cross multiply
    149,900.60x = 206,859.30 × 81,914.60
  4. Step 4: Simplify right side
    149,900.60x = 16,944,796,815.78
  5. Step 5: Solve for x
    x = 16,944,796,815.78/149,900.60
  6. Step 6: Final answer
    x = 113,040.22

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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.