Home / 231,112.10-318,936.80-135,620.39

Finding the Fourth Proportional to 231,112.10, 318,936.80 and 135,620.39

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Solution

The fourth proportional to 231,112.10, 318,936.80 and 135,620.39 is: 187,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,112.10 : 318,936.80 = 135,620.39 : x
  2. Step 2: Convert to fraction form
    231,112.10/318,936.80 = 135,620.39/x
  3. Step 3: Cross multiply
    231,112.10x = 318,936.80 × 135,620.39
  4. Step 4: Simplify right side
    231,112.10x = 43,254,331,945.72
  5. Step 5: Solve for x
    x = 43,254,331,945.72/231,112.10
  6. Step 6: Final answer
    x = 187,157.37

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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.