Home / 135,021.88-202,378.38-82,314.28

Finding the Fourth Proportional to 135,021.88, 202,378.38 and 82,314.28

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Solution

The fourth proportional to 135,021.88, 202,378.38 and 82,314.28 is: 123,377.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,021.88 : 202,378.38 = 82,314.28 : x
  2. Step 2: Convert to fraction form
    135,021.88/202,378.38 = 82,314.28/x
  3. Step 3: Cross multiply
    135,021.88x = 202,378.38 × 82,314.28
  4. Step 4: Simplify right side
    135,021.88x = 16,658,630,637.27
  5. Step 5: Solve for x
    x = 16,658,630,637.27/135,021.88
  6. Step 6: Final answer
    x = 123,377.27

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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.