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Finding the Fourth Proportional to 81,873.40, 122,810.10 and 26,469.40

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Solution

The fourth proportional to 81,873.40, 122,810.10 and 26,469.40 is: 39,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,873.40 : 122,810.10 = 26,469.40 : x
  2. Step 2: Convert to fraction form
    81,873.40/122,810.10 = 26,469.40/x
  3. Step 3: Cross multiply
    81,873.40x = 122,810.10 × 26,469.40
  4. Step 4: Simplify right side
    81,873.40x = 3,250,709,660.94
  5. Step 5: Solve for x
    x = 3,250,709,660.94/81,873.40
  6. Step 6: Final answer
    x = 39,704.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.