Home / 90,469.31-135,512.60-57,172.23

Finding the Fourth Proportional to 90,469.31, 135,512.60 and 57,172.23

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Solution

The fourth proportional to 90,469.31, 135,512.60 and 57,172.23 is: 85,637.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,469.31 : 135,512.60 = 57,172.23 : x
  2. Step 2: Convert to fraction form
    90,469.31/135,512.60 = 57,172.23/x
  3. Step 3: Cross multiply
    90,469.31x = 135,512.60 × 57,172.23
  4. Step 4: Simplify right side
    90,469.31x = 7,747,557,249.24
  5. Step 5: Solve for x
    x = 7,747,557,249.24/90,469.31
  6. Step 6: Final answer
    x = 85,637.41

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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.