Home / 135,768.38-187,555.79-108,509.55

Finding the Fourth Proportional to 135,768.38, 187,555.79 and 108,509.55

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Solution

The fourth proportional to 135,768.38, 187,555.79 and 108,509.55 is: 149,899.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,768.38 : 187,555.79 = 108,509.55 : x
  2. Step 2: Convert to fraction form
    135,768.38/187,555.79 = 108,509.55/x
  3. Step 3: Cross multiply
    135,768.38x = 187,555.79 × 108,509.55
  4. Step 4: Simplify right side
    135,768.38x = 20,351,593,830.25
  5. Step 5: Solve for x
    x = 20,351,593,830.25/135,768.38
  6. Step 6: Final answer
    x = 149,899.37

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1.5x scale

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.