Home / 190,003.78-285,005.49-90,109.51

Finding the Fourth Proportional to 190,003.78, 285,005.49 and 90,109.51

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Solution

The fourth proportional to 190,003.78, 285,005.49 and 90,109.51 is: 135,164.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,003.78 : 285,005.49 = 90,109.51 : x
  2. Step 2: Convert to fraction form
    190,003.78/285,005.49 = 90,109.51/x
  3. Step 3: Cross multiply
    190,003.78x = 285,005.49 × 90,109.51
  4. Step 4: Simplify right side
    190,003.78x = 25,681,705,051.21
  5. Step 5: Solve for x
    x = 25,681,705,051.21/190,003.78
  6. Step 6: Final answer
    x = 135,164.18

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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.