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Finding the Fourth Proportional to 134,626.80, 201,940.20 and 82,138.80

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Solution

The fourth proportional to 134,626.80, 201,940.20 and 82,138.80 is: 123,208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,626.80 : 201,940.20 = 82,138.80 : x
  2. Step 2: Convert to fraction form
    134,626.80/201,940.20 = 82,138.80/x
  3. Step 3: Cross multiply
    134,626.80x = 201,940.20 × 82,138.80
  4. Step 4: Simplify right side
    134,626.80x = 16,587,125,699.76
  5. Step 5: Solve for x
    x = 16,587,125,699.76/134,626.80
  6. Step 6: Final answer
    x = 123,208.20

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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.