Home / 128,057.36-191,930.51-90,628.37

Finding the Fourth Proportional to 128,057.36, 191,930.51 and 90,628.37

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Solution

The fourth proportional to 128,057.36, 191,930.51 and 90,628.37 is: 135,832.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,057.36 : 191,930.51 = 90,628.37 : x
  2. Step 2: Convert to fraction form
    128,057.36/191,930.51 = 90,628.37/x
  3. Step 3: Cross multiply
    128,057.36x = 191,930.51 × 90,628.37
  4. Step 4: Simplify right side
    128,057.36x = 17,394,349,261.23
  5. Step 5: Solve for x
    x = 17,394,349,261.23/128,057.36
  6. Step 6: Final answer
    x = 135,832.49

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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.